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": "dice_roll_probability", "description": "Calculates the probability of rolling a specific sum with a given number of dice, each having a certain number of faces.", "parameters": {"target_sum": {"description": "The target sum to calculate the probability for.", "type": "int", "default": 6}, "num_dice": {"description": "The number of dice being rolled.", "type": "int", "default": 6}, "num_faces": {"description": "The number of faces on each die. Defaults to 6.", "type": "int, optional"}}}, {"name": "sort_numbers", "description": "Sorts a list of numbers in ascending or descending order.", "parameters": {"numbers": {"description": "The list of numbers to be sorted.", "type": "List[float]"}, "descending": {"description": "If True, sorts the numbers in descending order. Defaults to False.", "type": "bool, optional"}}}]
What is the probability of rolling a sum of 20 with 4 dice, each having 6 faces?
user
assistant
[{"name": "dice_roll_probability", "arguments": {"target_sum": 20, "num_dice": 4, "num_faces": 6}}]