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": "std_deviation", "description": "Calculates the standard deviation of a list of numbers.", "parameters": {"numbers": {"description": "The list of numbers.", "type": "List[float]"}}}]
Compute the standard deviation for the numbers 3, 6, 9, 12, 15.
user
assistant
[{"name": "std_deviation", "arguments": {"numbers": [3, 6, 9, 12, 15]}}]