Update app.py

app.py

@@ -37,14 +37,14 @@ def get_current_time_in_timezone(timezone: str) -> str:
 
 
 @tool
-def get_city_id(city_name: str) -> int:
+def get_city_id(city_name: str) -> str:
     """A tool that get city ID from city name.
 
     Args:
         city_name:  The city name that you want to get city id written in Japanese.
 
     Returns:
-        city_id. If not get, return None.
+        city_id as string. If not get, return None.
     """
 
     # XMLのURL
@@ -70,14 +70,14 @@ def get_city_id(city_name: str) -> int:
         return None
 
 @tool
-def get_weather(city_id: int) -> str:
+def get_weather(city_id: str) -> str:
     """Get city weather forecast from city id.
 
     Args:
-        city_id: city id. (e.g., 140010)
+        city_id: A string that represent city id. (e.g., 140010)
 
     Returns:
-        Weather forecast
+        Weather forecast message
     """
     try:
         url = f"https://weather.tsukumijima.net/api/forecast?city={city_id}"