command /mc:
  permission: staff.mutechat
  trigger:
    if {globalmute} is set:
      delete {globalmute}
      broadcast "&2&lChat has been unmuted by &a%player%"
    else:
      set {globalmute} to true
      broadcast "&4&lChat has been muted by &c%player%"

on chat:
  if {globalmute} is set:
    cancel event if event-player does not have permission "staff.mutechat"