diff --git a/apps/emqx_bridge/src/emqx_bridge_api.erl b/apps/emqx_bridge/src/emqx_bridge_api.erl
index f7a1bb345..93b295b57 100644
--- a/apps/emqx_bridge/src/emqx_bridge_api.erl
+++ b/apps/emqx_bridge/src/emqx_bridge_api.erl
@@ -316,7 +316,7 @@ schema("/bridges") ->
         'operationId' => '/bridges',
         get => #{
             tags => [<<"bridges">>],
-            summary => <<"List Bridges">>,
+            summary => <<"List bridges">>,
             description => ?DESC("desc_api1"),
             responses => #{
                 200 => emqx_dashboard_swagger:schema_with_example(
@@ -327,7 +327,7 @@ schema("/bridges") ->
         },
         post => #{
             tags => [<<"bridges">>],
-            summary => <<"Create Bridge">>,
+            summary => <<"Create bridge">>,
             description => ?DESC("desc_api2"),
             'requestBody' => emqx_dashboard_swagger:schema_with_examples(
                 emqx_bridge_schema:post_request(),
@@ -344,7 +344,7 @@ schema("/bridges/:id") ->
         'operationId' => '/bridges/:id',
         get => #{
             tags => [<<"bridges">>],
-            summary => <<"Get Bridge">>,
+            summary => <<"Get bridge">>,
             description => ?DESC("desc_api3"),
             parameters => [param_path_id()],
             responses => #{
@@ -354,7 +354,7 @@ schema("/bridges/:id") ->
         },
         put => #{
             tags => [<<"bridges">>],
-            summary => <<"Update Bridge">>,
+            summary => <<"Update bridge">>,
             description => ?DESC("desc_api4"),
             parameters => [param_path_id()],
             'requestBody' => emqx_dashboard_swagger:schema_with_examples(
@@ -369,7 +369,7 @@ schema("/bridges/:id") ->
         },
         delete => #{
             tags => [<<"bridges">>],
-            summary => <<"Delete Bridge">>,
+            summary => <<"Delete bridge">>,
             description => ?DESC("desc_api5"),
             parameters => [param_path_id()],
             responses => #{
@@ -388,7 +388,7 @@ schema("/bridges/:id/metrics") ->
         'operationId' => '/bridges/:id/metrics',
         get => #{
             tags => [<<"bridges">>],
-            summary => <<"Get Bridge Metrics">>,
+            summary => <<"Get bridge metrics">>,
             description => ?DESC("desc_bridge_metrics"),
             parameters => [param_path_id()],
             responses => #{
@@ -402,7 +402,7 @@ schema("/bridges/:id/metrics/reset") ->
         'operationId' => '/bridges/:id/metrics/reset',
         put => #{
             tags => [<<"bridges">>],
-            summary => <<"Reset Bridge Metrics">>,
+            summary => <<"Reset bridge metrics">>,
             description => ?DESC("desc_api6"),
             parameters => [param_path_id()],
             responses => #{
@@ -417,7 +417,7 @@ schema("/bridges/:id/enable/:enable") ->
         put =>
             #{
                 tags => [<<"bridges">>],
-                summary => <<"Enable or Disable Bridge">>,
+                summary => <<"Enable or disable bridge">>,
                 desc => ?DESC("desc_enable_bridge"),
                 parameters => [param_path_id(), param_path_enable()],
                 responses =>
@@ -433,7 +433,7 @@ schema("/bridges/:id/:operation") ->
         'operationId' => '/bridges/:id/:operation',
         post => #{
             tags => [<<"bridges">>],
-            summary => <<"Stop or Restart Bridge">>,
+            summary => <<"Stop or restart bridge">>,
             description => ?DESC("desc_api7"),
             parameters => [
                 param_path_id(),
@@ -455,7 +455,7 @@ schema("/nodes/:node/bridges/:id/:operation") ->
         'operationId' => '/nodes/:node/bridges/:id/:operation',
         post => #{
             tags => [<<"bridges">>],
-            summary => <<"Stop/Restart Bridge">>,
+            summary => <<"Stop/Restart bridge">>,
             description => ?DESC("desc_api8"),
             parameters => [
                 param_path_node(),
diff --git a/apps/emqx_dashboard/src/emqx_dashboard_api.erl b/apps/emqx_dashboard/src/emqx_dashboard_api.erl
index cc2a1337d..d5655d99d 100644
--- a/apps/emqx_dashboard/src/emqx_dashboard_api.erl
+++ b/apps/emqx_dashboard/src/emqx_dashboard_api.erl
@@ -74,7 +74,7 @@ schema("/login") ->
         post => #{
             tags => [<<"dashboard">>],
             desc => ?DESC(login_api),
-            summary => <<"Dashboard Auth">>,
+            summary => <<"Dashboard authentication">>,
             'requestBody' => fields([username, password]),
             responses => #{
                 200 => fields([token, version, license]),
diff --git a/apps/emqx_gateway/src/emqx_gateway_api.erl b/apps/emqx_gateway/src/emqx_gateway_api.erl
index 1c43340e2..62f723d59 100644
--- a/apps/emqx_gateway/src/emqx_gateway_api.erl
+++ b/apps/emqx_gateway/src/emqx_gateway_api.erl
@@ -180,7 +180,7 @@ schema("/gateways") ->
             #{
                 tags => ?TAGS,
                 desc => ?DESC(list_gateway),
-                summary => <<"List All Gateways">>,
+                summary => <<"List all gateways">>,
                 parameters => params_gateway_status_in_qs(),
                 responses =>
                     #{
@@ -201,7 +201,7 @@ schema("/gateways/:name") ->
             #{
                 tags => ?TAGS,
                 desc => ?DESC(get_gateway),
-                summary => <<"Get the Gateway">>,
+                summary => <<"Get gateway">>,
                 parameters => params_gateway_name_in_path(),
                 responses =>
                     #{
@@ -608,7 +608,7 @@ examples_gateway_confs() ->
     #{
         stomp_gateway =>
             #{
-                summary => <<"A simple STOMP gateway configs">>,
+                summary => <<"A simple STOMP gateway config">>,
                 value =>
                     #{
                         enable => true,
@@ -636,7 +636,7 @@ examples_gateway_confs() ->
             },
         mqttsn_gateway =>
             #{
-                summary => <<"A simple MQTT-SN gateway configs">>,
+                summary => <<"A simple MQTT-SN gateway config">>,
                 value =>
                     #{
                         enable => true,
@@ -672,7 +672,7 @@ examples_gateway_confs() ->
             },
         coap_gateway =>
             #{
-                summary => <<"A simple CoAP gateway configs">>,
+                summary => <<"A simple CoAP gateway config">>,
                 value =>
                     #{
                         enable => true,
@@ -699,7 +699,7 @@ examples_gateway_confs() ->
             },
         lwm2m_gateway =>
             #{
-                summary => <<"A simple LwM2M gateway configs">>,
+                summary => <<"A simple LwM2M gateway config">>,
                 value =>
                     #{
                         enable => true,
@@ -735,7 +735,7 @@ examples_gateway_confs() ->
             },
         exproto_gateway =>
             #{
-                summary => <<"A simple ExProto gateway configs">>,
+                summary => <<"A simple ExProto gateway config">>,
                 value =>
                     #{
                         enable => true,
@@ -765,7 +765,7 @@ examples_update_gateway_confs() ->
     #{
         stomp_gateway =>
             #{
-                summary => <<"A simple STOMP gateway configs">>,
+                summary => <<"A simple STOMP gateway config">>,
                 value =>
                     #{
                         enable => true,
@@ -782,7 +782,7 @@ examples_update_gateway_confs() ->
             },
         mqttsn_gateway =>
             #{
-                summary => <<"A simple MQTT-SN gateway configs">>,
+                summary => <<"A simple MQTT-SN gateway config">>,
                 value =>
                     #{
                         enable => true,
@@ -803,7 +803,7 @@ examples_update_gateway_confs() ->
             },
         coap_gateway =>
             #{
-                summary => <<"A simple CoAP gateway configs">>,
+                summary => <<"A simple CoAP gateway config">>,
                 value =>
                     #{
                         enable => true,
@@ -819,7 +819,7 @@ examples_update_gateway_confs() ->
             },
         lwm2m_gateway =>
             #{
-                summary => <<"A simple LwM2M gateway configs">>,
+                summary => <<"A simple LwM2M gateway config">>,
                 value =>
                     #{
                         enable => true,
@@ -844,7 +844,7 @@ examples_update_gateway_confs() ->
             },
         exproto_gateway =>
             #{
-                summary => <<"A simple ExProto gateway configs">>,
+                summary => <<"A simple ExProto gateway config">>,
                 value =>
                     #{
                         enable => true,
diff --git a/apps/emqx_gateway/src/emqx_gateway_api_authn.erl b/apps/emqx_gateway/src/emqx_gateway_api_authn.erl
index f52b26cd2..41b1b11d5 100644
--- a/apps/emqx_gateway/src/emqx_gateway_api_authn.erl
+++ b/apps/emqx_gateway/src/emqx_gateway_api_authn.erl
@@ -185,13 +185,13 @@ schema("/gateways/:name/authentication") ->
             #{
                 tags => ?TAGS,
                 desc => ?DESC(get_authn),
-                summary => <<"Get Authenticator Configuration">>,
+                summary => <<"Get authenticator configuration">>,
                 parameters => params_gateway_name_in_path(),
                 responses =>
                     ?STANDARD_RESP(
                         #{
                             200 => schema_authn(),
-                            204 => <<"Authenticator doesn't initiated">>
+                            204 => <<"Authenticator not initialized">>
                         }
                     )
             },
@@ -199,7 +199,7 @@ schema("/gateways/:name/authentication") ->
             #{
                 tags => ?TAGS,
                 desc => ?DESC(update_authn),
-                summary => <<"Update Authenticator Configuration">>,
+                summary => <<"Update authenticator configuration">>,
                 parameters => params_gateway_name_in_path(),
                 'requestBody' => schema_authn(),
                 responses =>
@@ -209,7 +209,7 @@ schema("/gateways/:name/authentication") ->
             #{
                 tags => ?TAGS,
                 desc => ?DESC(add_authn),
-                summary => <<"Create an Authenticator for a Gateway">>,
+                summary => <<"Create authenticator for gateway">>,
                 parameters => params_gateway_name_in_path(),
                 'requestBody' => schema_authn(),
                 responses =>
@@ -219,7 +219,7 @@ schema("/gateways/:name/authentication") ->
             #{
                 tags => ?TAGS,
                 desc => ?DESC(delete_authn),
-                summary => <<"Delete the Gateway Authenticator">>,
+                summary => <<"Delete gateway authenticator">>,
                 parameters => params_gateway_name_in_path(),
                 responses =>
                     ?STANDARD_RESP(#{204 => <<"Deleted">>})
@@ -232,7 +232,7 @@ schema("/gateways/:name/authentication/users") ->
             #{
                 tags => ?TAGS,
                 desc => ?DESC(list_users),
-                summary => <<"List users for a Gateway Authenticator">>,
+                summary => <<"List users for gateway authenticator">>,
                 parameters => params_gateway_name_in_path() ++
                     params_paging_in_qs() ++
                     params_fuzzy_in_qs(),
@@ -250,7 +250,7 @@ schema("/gateways/:name/authentication/users") ->
             #{
                 tags => ?TAGS,
                 desc => ?DESC(add_user),
-                summary => <<"Add User for a Gateway Authenticator">>,
+                summary => <<"Add user for gateway authenticator">>,
                 parameters => params_gateway_name_in_path(),
                 'requestBody' => emqx_dashboard_swagger:schema_with_examples(
                     ref(emqx_authn_api, request_user_create),
@@ -274,7 +274,7 @@ schema("/gateways/:name/authentication/users/:uid") ->
             #{
                 tags => ?TAGS,
                 desc => ?DESC(get_user),
-                summary => <<"Get User Info for a Gateway Authenticator">>,
+                summary => <<"Get user info for gateway authenticator">>,
                 parameters => params_gateway_name_in_path() ++
                     params_userid_in_path(),
                 responses =>
@@ -291,7 +291,7 @@ schema("/gateways/:name/authentication/users/:uid") ->
             #{
                 tags => ?TAGS,
                 desc => ?DESC(update_user),
-                summary => <<"Update User Info for a Gateway Authenticator">>,
+                summary => <<"Update user info for gateway authenticator">>,
                 parameters => params_gateway_name_in_path() ++
                     params_userid_in_path(),
                 'requestBody' => emqx_dashboard_swagger:schema_with_examples(
@@ -312,7 +312,7 @@ schema("/gateways/:name/authentication/users/:uid") ->
             #{
                 tags => ?TAGS,
                 desc => ?DESC(delete_user),
-                summary => <<"Delete User for a Gateway Authenticator">>,
+                summary => <<"Delete user for gateway authenticator">>,
                 parameters => params_gateway_name_in_path() ++
                     params_userid_in_path(),
                 responses =>
diff --git a/apps/emqx_gateway/src/emqx_gateway_api_authn_user_import.erl b/apps/emqx_gateway/src/emqx_gateway_api_authn_user_import.erl
index 705fccf90..68f392923 100644
--- a/apps/emqx_gateway/src/emqx_gateway_api_authn_user_import.erl
+++ b/apps/emqx_gateway/src/emqx_gateway_api_authn_user_import.erl
@@ -126,7 +126,7 @@ schema("/gateways/:name/authentication/import_users") ->
             #{
                 tags => ?TAGS,
                 desc => ?DESC(emqx_gateway_api_authn, import_users),
-                summary => <<"Import Users">>,
+                summary => <<"Import users">>,
                 parameters => params_gateway_name_in_path(),
                 'requestBody' => emqx_dashboard_swagger:file_schema(filename),
                 responses =>
@@ -140,7 +140,7 @@ schema("/gateways/:name/listeners/:id/authentication/import_users") ->
             #{
                 tags => ?TAGS,
                 desc => ?DESC(emqx_gateway_api_listeners, import_users),
-                summary => <<"Import Users">>,
+                summary => <<"Import users">>,
                 parameters => params_gateway_name_in_path() ++
                     params_listener_id_in_path(),
                 'requestBody' => emqx_dashboard_swagger:file_schema(filename),
diff --git a/apps/emqx_gateway/src/emqx_gateway_api_clients.erl b/apps/emqx_gateway/src/emqx_gateway_api_clients.erl
index b30de3a3e..e64e918b4 100644
--- a/apps/emqx_gateway/src/emqx_gateway_api_clients.erl
+++ b/apps/emqx_gateway/src/emqx_gateway_api_clients.erl
@@ -460,7 +460,7 @@ schema("/gateways/:name/clients") ->
             #{
                 tags => ?TAGS,
                 desc => ?DESC(list_clients),
-                summary => <<"List Gateway's Clients">>,
+                summary => <<"List gateway's clients">>,
                 parameters => params_client_query(),
                 responses =>
                     ?STANDARD_RESP(#{
@@ -478,7 +478,7 @@ schema("/gateways/:name/clients/:clientid") ->
             #{
                 tags => ?TAGS,
                 desc => ?DESC(get_client),
-                summary => <<"Get Client Info">>,
+                summary => <<"Get client info">>,
                 parameters => params_client_insta(),
                 responses =>
                     ?STANDARD_RESP(#{200 => schema_client()})
@@ -487,7 +487,7 @@ schema("/gateways/:name/clients/:clientid") ->
             #{
                 tags => ?TAGS,
                 desc => ?DESC(kick_client),
-                summary => <<"Kick out Client">>,
+                summary => <<"Kick out client">>,
                 parameters => params_client_insta(),
                 responses =>
                     ?STANDARD_RESP(#{204 => <<"Kicked">>})
@@ -500,7 +500,7 @@ schema("/gateways/:name/clients/:clientid/subscriptions") ->
             #{
                 tags => ?TAGS,
                 desc => ?DESC(list_subscriptions),
-                summary => <<"List Client's Subscription">>,
+                summary => <<"List client's subscription">>,
                 parameters => params_client_insta(),
                 responses =>
                     ?STANDARD_RESP(
@@ -516,7 +516,7 @@ schema("/gateways/:name/clients/:clientid/subscriptions") ->
             #{
                 tags => ?TAGS,
                 desc => ?DESC(add_subscription),
-                summary => <<"Add Subscription for Client">>,
+                summary => <<"Add subscription for client">>,
                 parameters => params_client_insta(),
                 'requestBody' => emqx_dashboard_swagger:schema_with_examples(
                     ref(subscription),
@@ -540,7 +540,7 @@ schema("/gateways/:name/clients/:clientid/subscriptions/:topic") ->
             #{
                 tags => ?TAGS,
                 desc => ?DESC(delete_subscription),
-                summary => <<"Delete Client's Subscription">>,
+                summary => <<"Delete client's subscription">>,
                 parameters => params_topic_name_in_path() ++ params_client_insta(),
                 responses =>
                     ?STANDARD_RESP(#{204 => <<"Unsubscribed">>})
@@ -1020,12 +1020,12 @@ examples_client_list() ->
     #{
         general_client_list =>
             #{
-                summary => <<"General Client List">>,
+                summary => <<"General client list">>,
                 value => [example_general_client()]
             },
         lwm2m_client_list =>
             #{
-                summary => <<"LwM2M Client List">>,
+                summary => <<"LwM2M client list">>,
                 value => [example_lwm2m_client()]
             }
     }.
@@ -1034,12 +1034,12 @@ examples_client() ->
     #{
         general_client =>
             #{
-                summary => <<"General Client Info">>,
+                summary => <<"General client info">>,
                 value => example_general_client()
             },
         lwm2m_client =>
             #{
-                summary => <<"LwM2M Client Info">>,
+                summary => <<"LwM2M client info">>,
                 value => example_lwm2m_client()
             }
     }.
@@ -1048,12 +1048,12 @@ examples_subscription_list() ->
     #{
         general_subscription_list =>
             #{
-                summary => <<"A General Subscription List">>,
+                summary => <<"A general subscription list">>,
                 value => [example_general_subscription()]
             },
         stomp_subscription_list =>
             #{
-                summary => <<"The Stomp Subscription List">>,
+                summary => <<"The STOMP subscription list">>,
                 value => [example_stomp_subscription]
             }
     }.
@@ -1062,12 +1062,12 @@ examples_subscription() ->
     #{
         general_subscription =>
             #{
-                summary => <<"A General Subscription">>,
+                summary => <<"A general subscription">>,
                 value => example_general_subscription()
             },
         stomp_subscription =>
             #{
-                summary => <<"A Stomp Subscription">>,
+                summary => <<"A STOMP subscription">>,
                 value => example_stomp_subscription()
             }
     }.
diff --git a/apps/emqx_gateway/src/emqx_gateway_api_listeners.erl b/apps/emqx_gateway/src/emqx_gateway_api_listeners.erl
index 43c8156d6..14b80a500 100644
--- a/apps/emqx_gateway/src/emqx_gateway_api_listeners.erl
+++ b/apps/emqx_gateway/src/emqx_gateway_api_listeners.erl
@@ -362,7 +362,7 @@ schema("/gateways/:name/listeners") ->
             #{
                 tags => ?TAGS,
                 desc => ?DESC(list_listeners),
-                summary => <<"List All Listeners">>,
+                summary => <<"List all listeners">>,
                 parameters => params_gateway_name_in_path(),
                 responses =>
                     ?STANDARD_RESP(
@@ -378,7 +378,7 @@ schema("/gateways/:name/listeners") ->
             #{
                 tags => ?TAGS,
                 desc => ?DESC(add_listener),
-                summary => <<"Add a Listener">>,
+                summary => <<"Add listener">>,
                 parameters => params_gateway_name_in_path(),
                 %% XXX: How to distinguish the different listener supported by
                 %% different types of gateways?
@@ -404,7 +404,7 @@ schema("/gateways/:name/listeners/:id") ->
             #{
                 tags => ?TAGS,
                 desc => ?DESC(get_listener),
-                summary => <<"Get the Listener Configs">>,
+                summary => <<"Get listener config">>,
                 parameters => params_gateway_name_in_path() ++
                     params_listener_id_in_path(),
                 responses =>
@@ -421,7 +421,7 @@ schema("/gateways/:name/listeners/:id") ->
             #{
                 tags => ?TAGS,
                 desc => ?DESC(delete_listener),
-                summary => <<"Delete the Listener">>,
+                summary => <<"Delete listener">>,
                 parameters => params_gateway_name_in_path() ++
                     params_listener_id_in_path(),
                 responses =>
@@ -431,7 +431,7 @@ schema("/gateways/:name/listeners/:id") ->
             #{
                 tags => ?TAGS,
                 desc => ?DESC(update_listener),
-                summary => <<"Update the Listener Configs">>,
+                summary => <<"Update listener config">>,
                 parameters => params_gateway_name_in_path() ++
                     params_listener_id_in_path(),
                 'requestBody' => emqx_dashboard_swagger:schema_with_examples(
@@ -456,7 +456,7 @@ schema("/gateways/:name/listeners/:id/authentication") ->
             #{
                 tags => ?TAGS,
                 desc => ?DESC(get_listener_authn),
-                summary => <<"Get the Listener's Authenticator">>,
+                summary => <<"Get the listener's authenticator">>,
                 parameters => params_gateway_name_in_path() ++
                     params_listener_id_in_path(),
                 responses =>
@@ -471,7 +471,7 @@ schema("/gateways/:name/listeners/:id/authentication") ->
             #{
                 tags => ?TAGS,
                 desc => ?DESC(add_listener_authn),
-                summary => <<"Create an Authenticator for a Listener">>,
+                summary => <<"Create authenticator for listener">>,
                 parameters => params_gateway_name_in_path() ++
                     params_listener_id_in_path(),
                 'requestBody' => schema_authn(),
@@ -482,7 +482,7 @@ schema("/gateways/:name/listeners/:id/authentication") ->
             #{
                 tags => ?TAGS,
                 desc => ?DESC(update_listener_authn),
-                summary => <<"Update the Listener Authenticator configs">>,
+                summary => <<"Update config of authenticator for listener">>,
                 parameters => params_gateway_name_in_path() ++
                     params_listener_id_in_path(),
                 'requestBody' => schema_authn(),
@@ -493,7 +493,7 @@ schema("/gateways/:name/listeners/:id/authentication") ->
             #{
                 tags => ?TAGS,
                 desc => ?DESC(delete_listener_authn),
-                summary => <<"Delete the Listener's Authenticator">>,
+                summary => <<"Delete the listener's authenticator">>,
                 parameters => params_gateway_name_in_path() ++
                     params_listener_id_in_path(),
                 responses =>
@@ -507,7 +507,7 @@ schema("/gateways/:name/listeners/:id/authentication/users") ->
             #{
                 tags => ?TAGS,
                 desc => ?DESC(list_users),
-                summary => <<"List Authenticator's Users">>,
+                summary => <<"List authenticator's users">>,
                 parameters => params_gateway_name_in_path() ++
                     params_listener_id_in_path() ++
                     params_paging_in_qs(),
@@ -525,7 +525,7 @@ schema("/gateways/:name/listeners/:id/authentication/users") ->
             #{
                 tags => ?TAGS,
                 desc => ?DESC(add_user),
-                summary => <<"Add User for an Authenticator">>,
+                summary => <<"Add user for an authenticator">>,
                 parameters => params_gateway_name_in_path() ++
                     params_listener_id_in_path(),
                 'requestBody' => emqx_dashboard_swagger:schema_with_examples(
@@ -550,7 +550,7 @@ schema("/gateways/:name/listeners/:id/authentication/users/:uid") ->
             #{
                 tags => ?TAGS,
                 desc => ?DESC(get_user),
-                summary => <<"Get User Info">>,
+                summary => <<"Get user info">>,
                 parameters => params_gateway_name_in_path() ++
                     params_listener_id_in_path() ++
                     params_userid_in_path(),
@@ -568,7 +568,7 @@ schema("/gateways/:name/listeners/:id/authentication/users/:uid") ->
             #{
                 tags => ?TAGS,
                 desc => ?DESC(update_user),
-                summary => <<"Update User Info">>,
+                summary => <<"Update user info">>,
                 parameters => params_gateway_name_in_path() ++
                     params_listener_id_in_path() ++
                     params_userid_in_path(),
@@ -590,7 +590,7 @@ schema("/gateways/:name/listeners/:id/authentication/users/:uid") ->
             #{
                 tags => ?TAGS,
                 desc => ?DESC(delete_user),
-                summary => <<"Delete User">>,
+                summary => <<"Delete user">>,
                 parameters => params_gateway_name_in_path() ++
                     params_listener_id_in_path() ++
                     params_userid_in_path(),
@@ -712,7 +712,7 @@ examples_listener() ->
     #{
         tcp_listener =>
             #{
-                summary => <<"A simple tcp listener example">>,
+                summary => <<"A simple TCP listener example">>,
                 value =>
                     #{
                         name => <<"tcp-def">>,
@@ -738,7 +738,7 @@ examples_listener() ->
             },
         ssl_listener =>
             #{
-                summary => <<"A simple ssl listener example">>,
+                summary => <<"A simple SSL listener example">>,
                 value =>
                     #{
                         name => <<"ssl-def">>,
@@ -771,7 +771,7 @@ examples_listener() ->
             },
         udp_listener =>
             #{
-                summary => <<"A simple udp listener example">>,
+                summary => <<"A simple UDP listener example">>,
                 value =>
                     #{
                         name => <<"udp-def">>,
@@ -789,7 +789,7 @@ examples_listener() ->
             },
         dtls_listener =>
             #{
-                summary => <<"A simple dtls listener example">>,
+                summary => <<"A simple DTLS listener example">>,
                 value =>
                     #{
                         name => <<"dtls-def">>,
@@ -817,7 +817,7 @@ examples_listener() ->
             },
         dtls_listener_with_psk_ciphers =>
             #{
-                summary => <<"A dtls listener with PSK example">>,
+                summary => <<"A DTLS listener with PSK example">>,
                 value =>
                     #{
                         name => <<"dtls-psk">>,
@@ -845,7 +845,7 @@ examples_listener() ->
             },
         lisetner_with_authn =>
             #{
-                summary => <<"A tcp listener with authentication example">>,
+                summary => <<"A TCP listener with authentication example">>,
                 value =>
                     #{
                         name => <<"tcp-with-authn">>,
diff --git a/apps/emqx_modules/i18n/emqx_topic_metrics_api_i18n.conf b/apps/emqx_modules/i18n/emqx_topic_metrics_api_i18n.conf
index 623884f31..22f038d4e 100644
--- a/apps/emqx_modules/i18n/emqx_topic_metrics_api_i18n.conf
+++ b/apps/emqx_modules/i18n/emqx_topic_metrics_api_i18n.conf
@@ -1,7 +1,7 @@
 emqx_topic_metrics_api {
   get_topic_metrics_api {
     desc {
-      en: """List Topic metrics"""
+      en: """List topic metrics"""
       zh: """获取主题监控数据"""
     }
   }
@@ -15,21 +15,21 @@ emqx_topic_metrics_api {
 
   post_topic_metrics_api {
     desc {
-      en: """Create Topic metrics"""
+      en: """Create topic metrics"""
       zh: """创建主题监控数据"""
     }
   }
 
   gat_topic_metrics_data_api {
     desc {
-      en: """Get Topic metrics"""
+      en: """Get topic metrics"""
       zh: """获取主题监控数据"""
     }
   }
 
   delete_topic_metrics_data_api {
     desc {
-      en: """Delete Topic metrics"""
+      en: """Delete topic metrics"""
       zh: """删除主题监控数据"""
     }
   }
@@ -43,7 +43,7 @@ emqx_topic_metrics_api {
 
   topic_metrics_api_response400 {
     desc {
-      en: """Bad Request. Already exists or bad topic name"""
+      en: """Bad request. Already exists or bad topic name"""
       zh: """错误请求。已存在或错误的主题名称"""
     }
   }
diff --git a/apps/emqx_rule_engine/src/emqx_rule_engine_api.erl b/apps/emqx_rule_engine/src/emqx_rule_engine_api.erl
index 30de3e8e8..106693a0a 100644
--- a/apps/emqx_rule_engine/src/emqx_rule_engine_api.erl
+++ b/apps/emqx_rule_engine/src/emqx_rule_engine_api.erl
@@ -180,7 +180,7 @@ schema("/rules") ->
                 ref(emqx_dashboard_swagger, page),
                 ref(emqx_dashboard_swagger, limit)
             ],
-            summary => <<"List Rules">>,
+            summary => <<"List rules">>,
             responses => #{
                 200 =>
                     [
@@ -193,7 +193,7 @@ schema("/rules") ->
         post => #{
             tags => [<<"rules">>],
             description => ?DESC("api2"),
-            summary => <<"Create a Rule">>,
+            summary => <<"Create a rule">>,
             'requestBody' => rule_creation_schema(),
             responses => #{
                 400 => error_schema('BAD_REQUEST', "Invalid Parameters"),
@@ -207,7 +207,7 @@ schema("/rule_events") ->
         get => #{
             tags => [<<"rules">>],
             description => ?DESC("api3"),
-            summary => <<"List Events">>,
+            summary => <<"List rule events">>,
             responses => #{
                 200 => mk(ref(emqx_rule_api_schema, "rule_events"), #{})
             }
@@ -219,7 +219,7 @@ schema("/rules/:id") ->
         get => #{
             tags => [<<"rules">>],
             description => ?DESC("api4"),
-            summary => <<"Get a Rule">>,
+            summary => <<"Get rule">>,
             parameters => param_path_id(),
             responses => #{
                 404 => error_schema('NOT_FOUND', "Rule not found"),
@@ -229,7 +229,7 @@ schema("/rules/:id") ->
         put => #{
             tags => [<<"rules">>],
             description => ?DESC("api5"),
-            summary => <<"Update a Rule">>,
+            summary => <<"Update rule">>,
             parameters => param_path_id(),
             'requestBody' => rule_creation_schema(),
             responses => #{
@@ -240,7 +240,7 @@ schema("/rules/:id") ->
         delete => #{
             tags => [<<"rules">>],
             description => ?DESC("api6"),
-            summary => <<"Delete a Rule">>,
+            summary => <<"Delete rule">>,
             parameters => param_path_id(),
             responses => #{
                 204 => <<"Delete rule successfully">>
@@ -253,7 +253,7 @@ schema("/rules/:id/metrics") ->
         get => #{
             tags => [<<"rules">>],
             description => ?DESC("api4_1"),
-            summary => <<"Get a Rule's Metrics">>,
+            summary => <<"Get rule metrics">>,
             parameters => param_path_id(),
             responses => #{
                 404 => error_schema('NOT_FOUND', "Rule not found"),
@@ -267,7 +267,7 @@ schema("/rules/:id/metrics/reset") ->
         put => #{
             tags => [<<"rules">>],
             description => ?DESC("api7"),
-            summary => <<"Reset a Rule Metrics">>,
+            summary => <<"Reset rule metrics">>,
             parameters => param_path_id(),
             responses => #{
                 404 => error_schema('NOT_FOUND', "Rule not found"),
@@ -281,7 +281,7 @@ schema("/rule_test") ->
         post => #{
             tags => [<<"rules">>],
             description => ?DESC("api8"),
-            summary => <<"Test a Rule">>,
+            summary => <<"Test a rule">>,
             'requestBody' => rule_test_schema(),
             responses => #{
                 400 => error_schema('BAD_REQUEST', "Invalid Parameters"),
diff --git a/changes/ce/fix-10196.en.md b/changes/ce/fix-10196.en.md
new file mode 100644
index 000000000..58ff01d8e
--- /dev/null
+++ b/changes/ce/fix-10196.en.md
@@ -0,0 +1 @@
+Use lower-case for schema summaries and descritptions to be used in menu of generated online documentation.