Fix: list MCP tools may block (#12067)

### What problem does this PR solve?

 List MCP tools may block. #12043

### Type of change

- [x] Bug Fix (non-breaking change which fixes an issue)

api/apps/mcp_server_app.py

@@ -13,6 +13,8 @@
 #  See the License for the specific language governing permissions and
 #  limitations under the License.
 #
+import asyncio
+
 from quart import Response, request
 from api.apps import current_user, login_required
 
@@ -106,7 +108,7 @@ async def create() -> Response:
             return get_data_error_result(message="Tenant not found.")
 
         mcp_server = MCPServer(id=server_name, name=server_name, url=url, server_type=server_type, variables=variables, headers=headers)
-        server_tools, err_message = get_mcp_tools([mcp_server], timeout)
+        server_tools, err_message = await asyncio.to_thread(get_mcp_tools, [mcp_server], timeout)
         if err_message:
             return get_data_error_result(err_message)
 
@@ -158,7 +160,7 @@ async def update() -> Response:
         req["id"] = mcp_id
 
         mcp_server = MCPServer(id=server_name, name=server_name, url=url, server_type=server_type, variables=variables, headers=headers)
-        server_tools, err_message = get_mcp_tools([mcp_server], timeout)
+        server_tools, err_message = await asyncio.to_thread(get_mcp_tools, [mcp_server], timeout)
         if err_message:
             return get_data_error_result(err_message)
 
@@ -242,7 +244,7 @@ async def import_multiple() -> Response:
             headers = {"authorization_token": config["authorization_token"]} if "authorization_token" in config else {}
             variables = {k: v for k, v in config.items() if k not in {"type", "url", "headers"}}
             mcp_server = MCPServer(id=new_name, name=new_name, url=config["url"], server_type=config["type"], variables=variables, headers=headers)
-            server_tools, err_message = get_mcp_tools([mcp_server], timeout)
+            server_tools, err_message = await asyncio.to_thread(get_mcp_tools, [mcp_server], timeout)
             if err_message:
                 results.append({"server": base_name, "success": False, "message": err_message})
                 continue
@@ -322,7 +324,7 @@ async def list_tools() -> Response:
                 tool_call_sessions.append(tool_call_session)
 
                 try:
-                    tools = tool_call_session.get_tools(timeout)
+                    tools = await asyncio.to_thread(tool_call_session.get_tools, timeout)
                 except Exception as e:
                     tools = []
                     return get_data_error_result(message=f"MCP list tools error: {e}")
@@ -340,7 +342,7 @@ async def list_tools() -> Response:
         return server_error_response(e)
     finally:
         # PERF: blocking call to close sessions — consider moving to background thread or task queue
-        close_multiple_mcp_toolcall_sessions(tool_call_sessions)
+        await asyncio.to_thread(close_multiple_mcp_toolcall_sessions, tool_call_sessions)
 
 
 @manager.route("/test_tool", methods=["POST"])  # noqa: F821
@@ -367,10 +369,10 @@ async def test_tool() -> Response:
 
         tool_call_session = MCPToolCallSession(mcp_server, mcp_server.variables)
         tool_call_sessions.append(tool_call_session)
-        result = tool_call_session.tool_call(tool_name, arguments, timeout)
+        result = await asyncio.to_thread(tool_call_session.tool_call, tool_name, arguments, timeout)
 
         # PERF: blocking call to close sessions — consider moving to background thread or task queue
-        close_multiple_mcp_toolcall_sessions(tool_call_sessions)
+        await asyncio.to_thread(close_multiple_mcp_toolcall_sessions, tool_call_sessions)
         return get_json_result(data=result)
     except Exception as e:
         return server_error_response(e)
@@ -424,13 +426,13 @@ async def test_mcp() -> Response:
         tool_call_session = MCPToolCallSession(mcp_server, mcp_server.variables)
 
         try:
-            tools = tool_call_session.get_tools(timeout)
+            tools = await asyncio.to_thread(tool_call_session.get_tools, timeout)
         except Exception as e:
             tools = []
             return get_data_error_result(message=f"Test MCP error: {e}")
         finally:
             # PERF: blocking call to close sessions — consider moving to background thread or task queue
-            close_multiple_mcp_toolcall_sessions([tool_call_session])
+            await asyncio.to_thread(close_multiple_mcp_toolcall_sessions, [tool_call_session])
 
         for tool in tools:
             tool_dict = tool.model_dump()