Docs: Add missing docstring to get_weather function (openai#1478)

Author: Abbas-Asad

examples/basic/tools.py

@@ -13,6 +13,7 @@ class Weather(BaseModel):
 
 @function_tool
 def get_weather(city: str) -> Weather:
+    """Get the current weather information for a specified city."""
     print("[debug] get_weather called")
     return Weather(city=city, temperature_range="14-20C", conditions="Sunny with wind.")