Update app.py

app.py

@@ -41,7 +41,16 @@ def get_local_timezone() -> str:
 
 @tool
 def get_hourly_weather(latitude: float, longitude: float, timezone: str) -> list:
-    """Fetch hourly weather forecast for next 24 hours including uncertainty bands."""
+    """Fetch hourly weather forecast for next 24 hours including uncertainty bands.
+        Args:
+        latitude: The latitude of the location.
+        longitude: The longitude of the location.
+        timezone: The IANA timezone string (e.g., 'America/Los_Angeles').
+
+    Returns:
+        A list of hourly weather data points with temperature, precipitation,
+        uncertainty bounds, and weather codes.
+    """
     try:
         url = "https://api.open-meteo.com/v1/forecast"