Rules Action, User to inform, change type text to type List

Hi,

wouldn't it be better, to use type List here instead of type text?!

      'users' => array(
        'type' => 'text',
        'label' => t('Users uids'),
        'description' => t('Put uids of users to which action message is going to be sent. Comma-separated values. Example: 2, 3, [account:uid], 35.'),
        'optional' => TRUE,
      ),

Or is there another way, to get all users informed who "flagged" to be informed, when a certain content type is created?!

Best regards,

Tobi