def METHOD_NAME(
    self, *, is_operation_file: bool  # pylint: disable=unused-argument
) -> str:
    possible_values = [self.get_declaration(v.value) for v in self.values]
    if not possible_values:
        return ""
    if len(possible_values) == 1:
        return possible_values[0]
    if len(possible_values) == 2:
        possible_values_str = " and ".join(possible_values)
    else:
        possible_values_str = (
            ", ".join(possible_values[: len(possible_values) - 1])
            + f", and {possible_values[-1]}"
        )
    enum_description = f"Known values are: {possible_values_str}."
    return enum_description