Update app.py

app.py

@@ -42,7 +42,11 @@ def hourly_temperature(latitude: float, longitude: float) -> str:
 
 @tool
 def get_current_time_in_timezone(timezone: str) -> str:
-    """Fetch current local time for a given timezone."""
+     """Fetch current local time for a given timezone.
+
+    Args:
+        timezone: A string representing a valid timezone (e.g., 'Africa/Kigali').
+    """
     try:
         tz = pytz.timezone(timezone)
         local_time = datetime.datetime.now(tz).strftime("%Y-%m-%d %H:%M:%S")