diff --git a/app/controller/add_langgraph_chat_route.py b/app/controller/add_langgraph_chat_route.py
index ce465af..688daf7 100644
--- a/app/controller/add_langgraph_chat_route.py
+++ b/app/controller/add_langgraph_chat_route.py
@@ -28,12 +28,7 @@ from app.utils.postgres_checkpointer import PostgresCheckpointerManager, AsyncPo
   description="一个用于获取当前时间的工具，没有参数"
 )
 def tool_get_datetime():
-  return {
-    "result": f"当前时间为：{datetime.datetime.now().strftime('%Y-%m-%d %H:%M:%S')}",
-    "render": {
-      "type": "DataTable"
-    }
-  }
+  return f"当前时间为：{datetime.datetime.now().strftime('%Y-%m-%d %H:%M:%S')}"
 
 
 @tool(