Update app.py

app.py

@@ -21,6 +21,10 @@ def describe_plant_image(user_query: str, image_url: str) -> str:
     Describe a plant image and answer the user's query.
     Only to be used if and only if a user provides an image_url or if
     prior chat messages have retrieved image_url(s).
+
+    Args:
+        user_query: Any relevant text pertaining to the image_url that has been based off the chat
+        image_url: The image url that has been provided by the user 
     """
     system_prompt = (
         "You are an LLM assistant that analyzes plant images and:\n"