Commands:
/craftwars - For help and info
/craftwars setup - For setting up possible items to be selected.
/craftwars start - For starting the craftwars.

Permissions:
craftwars.deny - Denies the player to participate in any craftwars and denies the use any craftwars command
craftwars.setup - The permission needed for setting up the craftwars.
craftwars.start - The permission needed to start the craftwars.

NOTE: Any op player can use any craftwars command without the need of having any permissions set.