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": "is_valid_sudoku", "description": "Checks if a 9x9 Sudoku board is valid.", "parameters": {"board": {"description": "The Sudoku board represented as a 2D list of strings.", "type": "List[List[str]]"}}}, {"name": "polygon_area_shoelace", "description": "Calculates the area of a polygon using the shoelace formula.", "parameters": {"vertices": {"description": "A list of polygon vertices represented as tuples (x, y).", "type": "List[Tuple[float, float]]"}}}]
Is the Sudoku board valid where the first row is ['.', '.', '9', '7', '4', '8', '.', '.', '.'], the second row is ['7', '.', '.', '.', '.', '.', '.', '.', '.'], and so on?
user
assistant
[{"name": "is_valid_sudoku", "arguments": {"board": [[".", ".", "9", "7", "4", "8", ".", ".", "."], ["7", ".", ".", ".", ".", ".", ".", ".", "."], ["5", ".", ".", ".", ".", ".", ".", ".", "6"], [".", ".", "7", ".", ".", ".", ".", ".", "."], [".", "1", ".", ".", "9", ".", ".", ".", "."], [".", ".", ".", ".", ".", ".", "8", ".", "."], [".", ".", ".", ".", ".", "6", ".", ".", "3"], [".", ".", ".", ".", ".", ".", ".", ".", "5"], [".", ".", ".", "2", "5", "9", ".", ".", "."]]}}]