def get_start_reportid_descr(allowed_chars):
    """
    Returns description for the '--reportid' option of the 'start' command. The 'allowed_chars'
    argument should be the allowed report ID characters description string.
    """

    descr = f"""Any string which may serve as an identifier of this run. By default report ID is the
                current date, prefixed with the remote host name in case the '-H' option was used:
                [hostname-]YYYYMMDD. For example, "20150323" is a report ID for a run made on March
                23, 2015. The allowed characters are: {allowed_chars}."""
    return descr