update tool

app.py

@@ -16,9 +16,9 @@ def my_search_tool(query:str)-> str: #it's import to specify the return type
         query: the user query        
     """
     try: 
-        search_tool = DuckDuckGoSearchTool(query)
+        search_tool = DuckDuckGoSearchTool()
         
-        return search_tool
+        return search_tool(query)
 
     except Exception as e:
         return f"Error fetching response for '{query}': {str(e)}"