def METHOD_NAME(bbox: Optional[List[float]] = None, **kwargs):
    """Generates a root tile with the provided arguments and default values.
    Args:
        bbox (optional): A 12-element list that represents Next tileset's boundingVolume.box property. Defaults to None.
        **kwargs: Keyword arguments to be added to the root tile.
    Returns:
        A root tile.
    """
    bounding_volume = {"box": bbox} if bbox is not None else {}
    root_tile = Tile(
        boundingVolume=bounding_volume,
        geometricError=512,
        refine="ADD",
    )
    for key, value in kwargs.items():
        root_tile[key] = value
    return root_tile