diff --git a/apps/emqx_bridge_hstreamdb/src/emqx_bridge_hstreamdb_connector.erl b/apps/emqx_bridge_hstreamdb/src/emqx_bridge_hstreamdb_connector.erl
index 16092f262..1e2ebbfb1 100644
--- a/apps/emqx_bridge_hstreamdb/src/emqx_bridge_hstreamdb_connector.erl
+++ b/apps/emqx_bridge_hstreamdb/src/emqx_bridge_hstreamdb_connector.erl
@@ -119,10 +119,13 @@ roots() ->
 
 fields(config) ->
     [
-        {url, mk(binary(), #{required => true, desc => ?DESC("url")})},
+        {url,
+            mk(binary(), #{
+                required => true, desc => ?DESC("url"), default => <<"http://127.0.0.1:6570">>
+            })},
         {stream, mk(binary(), #{required => true, desc => ?DESC("stream_name")})},
         {partition_key, mk(binary(), #{required => false, desc => ?DESC("partition_key")})},
-        {pool_size, mk(pos_integer(), #{required => true, desc => ?DESC("pool_size")})},
+        {pool_size, fun emqx_connector_schema_lib:pool_size/1},
         {grpc_timeout, fun grpc_timeout/1}
     ] ++ emqx_connector_schema_lib:ssl_fields().
 
diff --git a/rel/i18n/emqx_bridge_hstreamdb_connector.hocon b/rel/i18n/emqx_bridge_hstreamdb_connector.hocon
index c0faa794c..8f7ac2edb 100644
--- a/rel/i18n/emqx_bridge_hstreamdb_connector.hocon
+++ b/rel/i18n/emqx_bridge_hstreamdb_connector.hocon
@@ -19,31 +19,31 @@ name.label:
 """Connector Name"""
 
 url.desc:
-"""HStreamDB Server URL"""
+"""HStreamDB Server URL. Using gRPC http server address."""
 
 url.label:
 """HStreamDB Server URL"""
 
 stream_name.desc:
-"""HStreamDB Stream Name"""
+"""HStreamDB Stream Name."""
 
 stream_name.label:
 """HStreamDB Stream Name"""
 
 partition_key.desc:
-"""HStreamDB Ordering Key"""
+"""HStreamDB Partition Key. Placeholders supported."""
 
 partition_key.label:
-"""HStreamDB Ordering Key"""
+"""HStreamDB Partition Key"""
 
 pool_size.desc:
-"""HStreamDB Pool Size"""
+"""HStreamDB Pool Size."""
 
 pool_size.label:
 """HStreamDB Pool Size"""
 
 grpc_timeout.desc:
-"""HStreamDB gRPC Timeout"""
+"""HStreamDB gRPC Timeout."""
 
 grpc_timeout.label:
 """HStreamDB gRPC Timeout"""