fix(mcp): sync workflow description to MCP server on update

When updating an MCP server configuration, the description was not
syncing from the updated workflow description unless explicitly cleared.

This fix ensures that when a user updates their workflow description
and then updates the MCP server, the MCP server description reflects
the current workflow description unless an explicit custom description
is provided.

Fixes #33626

api/controllers/console/app/mcp_server.py

@@ -102,11 +102,11 @@ class AppMCPServerController(Resource):
         if not server:
             raise NotFound()
 
-        description = payload.description
-        if description is None or not description:
-            server.description = app_model.description or ""
+        # Always sync description from app model unless explicitly provided
+        if payload.description:
+            server.description = payload.description
         else:
-            server.description = description
+            server.description = app_model.description or ""
 
         server.name = app_model.name