fix

app.py

@@ -15,9 +15,9 @@ def web_search_tool(searchContent:str)-> str: #it's import to specify the return
     Args:
         searchContent: which keyword will be searched
     """
-    results = DuckDuckGoSearchTool(max_results=5, rate_limit=2.0, searchContent)
+    results = DuckDuckGoSearchTool(max_results=5, rate_limit=2.0)
      
-    return results
+    return results(searchContent)
 
 @tool
 def get_current_time_in_timezone(timezone: str) -> str: