Bukkit

Ive been trying to add custom messages to my guns for a while now, such as "you cannot use this for another *seconds*", a delay between shots message, or visually show the amount of ammunition left in the gun? instead of it showing for a second when you hover over it in your hot bar, have it presented permanently, but I couldnt find anything in the config that is message related? Idk if this is the place to post this but I'm honestly out of ideas