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": "neuronal_activity_rate", "description": "Calculates the neuronal activity rate based on the synaptic input rate, synaptic weight, and decay constant.", "parameters": {"synaptic_input_rate": {"description": "The rate of synaptic inputs per second.", "type": "int", "default": 1.0}, "synaptic_weight": {"description": "The weight of the synaptic input, denoting its influence. Defaults to 1.0.", "type": "float, optional", "default": 0.1}, "decay_constant": {"description": "The rate at which the neuron's potential decays. Defaults to 0.1.", "type": "float, optional", "default": 1.0}}}, {"name": "std_deviation", "description": "Calculates the standard deviation of a list of numbers.", "parameters": {"numbers": {"description": "The list of numbers.", "type": "List[float]"}}}, {"name": "convert_cooking_measurements", "description": "Converts a quantity of a cooking ingredient from one measurement unit to another.", "parameters": {"quantity": {"description": "The quantity of the item to convert.", "type": "float"}, "from_unit": {"description": "The unit of the input quantity (e.g., 'cup', 'gram').", "type": "str"}, "to_unit": {"description": "The unit to which the quantity should be converted (e.g., 'ounce', 'kilogram').", "type": "str"}, "item": {"description": "The cooking ingredient being converted (e.g., 'flour', 'sugar').", "type": "str"}}}, {"name": "is_prime", "description": "Checks if a number is prime.", "parameters": {"num": {"description": "The number to be checked.", "type": "int"}}}, {"name": "permutation_count", "description": "Calculates the number of permutations of k elements from a set of n elements.", "parameters": {"n": {"description": "The total number of elements in the set.", "type": "int"}, "k": {"description": "The number of elements to choose for the permutation.", "type": "int"}}}, {"name": "matrix_multiply", "description": "Multiplies two matrices.", "parameters": {"matrix_a": {"description": "The first matrix.", "type": "List[List[float]]"}, "matrix_b": {"description": "The second matrix.", "type": "List[List[float]]"}}}]
Calculate the standard deviation of the numbers 3, 6, 9, 12, 15.
user
assistant
[{"name": "std_deviation", "arguments": {"numbers": [3, 6, 9, 12, 15]}}]