Update app.py

app.py

@@ -22,7 +22,8 @@ def my_custom_tool(arg1:str, img: bool)-> str: #it's import to specify the retur
             img = image_generation_tool(arg1)
             return img
         else:
-            answer = DuckDuckGoSearchTool(arg1)
+            search_obj = DuckDuckGoSearchTool()
+            answer = search_obj(arg1)
             return str(answer)
     except Exception as e:
         return f"error occurred in my_custom_tool...{str(e)}"