[DustyPorViva]

Ya, the best way to fix scripts is to debug the crap out of them. Start by assuming what's the problem, where the script isn't working. Do this by echo'ing variables and other important information. Repeat this process until you figure out what isn't working correctly, what isn't doing what you want it to do, and change it.
Also:
triggeraction(0,0,"serverside",Tools/TNT,"use");
should be:
triggeraction(0,0,"serverside","Tools/TNT","use");
though it's preferred you do:
triggerserver("gui","Tools/TNT","use");

Also, it might be "/tnt", for some reason I have problems getting stuff like player.chat=="/..." to work, but if I remove the /, it works perfectly fine(I doubt this is the problem, but could be... that's what debugging is for). And going along with what everyone else has said, parameters, like array, start their index at 0. so basically subtract 1 from every params[x].