def admin_commands() ->dict:
    """Lists the available sub-commands of the 'chado admin' command with corresponding descriptions"""
    return {'create': 'create a new CHADO database', 'drop':
        'drop a CHADO database', 'dump':
        'dump a CHADO database into an archive file', 'restore':
        'restore a CHADO database from an archive file', 'setup':
        'set up a blank CHADO database according to a given schema',
        'grant': 'grant privileges for a CHADO database to a user/role',
        'revoke': 'revoke privileges for a CHADO database from a user/role'}
