def get_mtl_tile_file_name(secondary=False):
    """Convenience function to grab the name of the MTL tile file.

    Parameters
    ----------
    secondary : :class:`bool`, optional, defaults to ``False``
        If ``True`` return the name of the MTL tile file for secondary
        targets instead of the standard, primary MTL tile file.

    Returns
    -------
    :class:`str`
        The name of the MTL tile file.
    """
    fn = "mtl-done-tiles.ecsv"
    if secondary:
        fn = "scnd-mtl-done-tiles.ecsv"

    return fn