update tool

app.py

@@ -18,7 +18,7 @@ def my_search_tool(query:str)-> str: #it's import to specify the return type
     try: 
         search_tool = DuckDuckGoSearchTool()
         
-        return search_tool.invoke(query)
+        return search_tool
 
     except Exception as e:
         return f"Error fetching response for '{query}': {str(e)}"