def tag_strs(*args: str, prefix_: str = "%", suffix_: str = "%") -> tuple[str, ...]:
    """Add tags to key names

    Args:
        args (tuple): N positional args treated as keys to tag.
        prefix_ (str, optional): String to append to the left of the key.
            Defaults to "%".
        suffix_ (str, optional): String to append to the right of the key.
            Defaults to "%".

    Returns:
        tuple[str, ...]: tagged item(s), e.g., 'MYVAR' -> ('%MYVAR%',)
    """
    return tuple(f"{prefix_}{v}{suffix_}" for v in args)