diff --git a/examples/agent_patterns/forcing_tool_use.py b/examples/agent_patterns/forcing_tool_use.py
index 3f4e35ae8..3eb27d9f8 100644
--- a/examples/agent_patterns/forcing_tool_use.py
+++ b/examples/agent_patterns/forcing_tool_use.py
@@ -44,6 +44,7 @@ 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")