Update app.py

app.py

@@ -123,7 +123,14 @@ def weather_icon(code):
 
 @tool
 def plot_weather(weather_data: list) -> str:
-    """Generate stylized weather visualization with icons + uncertainty bands."""
+    """Generate stylized weather visualization with icons and uncertainty bands.
+
+    Args:
+        weather_data: A list of dictionaries containing hourly weather data.
+
+    Returns:
+        A string file path to the generated image.
+    """
 
     times = [entry["time"][11:16] for entry in weather_data]
     temps = [entry["temperature"] for entry in weather_data]