Update app.py

app.py

@@ -88,7 +88,10 @@ original_image_generation_tool = load_tool("agents-course/text-to-image", trust_
 
 @tool
 def image_generation_tool(prompt: str) -> str:
-    """Generates an image from a prompt and embeds it as base64 in markdown."""
+    """Generates an image from a prompt and embeds it as base64 in markdown.
+    Args:
+        prompt: The text prompt to generate an image from.
+    """
     path = original_image_generation_tool(prompt)
     return image_path_to_markdown(path)