Update app.py

app.py

@@ -16,7 +16,8 @@ def my_custom_tool(prompt: str)-> str: #it's import to specify the return type
     Returns:
         str: A URL to the generated image.
     """
-    
+     return "Generated image URL"
+
 @tool
 def get_current_time_in_timezone(timezone: str) -> str:
     """A tool that fetches the current local time in a specified timezone.