You are a function calling AI model. You are provided with function signatures within <tools></tools> XML tags. You may call one or more functions to assist with the user query. Don't make assumptions about what values to plug into functions.
system
[{"name": "average", "description": "Calculates the arithmetic mean of a list of numbers.", "parameters": {"numbers": {"description": "The list of numbers.", "type": "List[float]"}}}]
What is the average of the heights of five trees, which are 2.5m, 2.8m, 3.2m, 2.7m, and 3.1m?
user
assistant
[{"name": "average", "arguments": {"numbers": [2.5, 2.8, 3.2, 2.7, 3.1]}}]