The froglok prisoner comes out of his prison to woop your butt at low lvl. I don't believe this was the case in live until the person actually opened the cage.
Further, he is part of Marda's Secret Mission:
http://everquest.allakhazam.com/db/quest.html?quest=287
However, one must complete The Emissary first.
http://everquest.allakhazam.com/db/quest.html?quest=278
You'd do this quest because of the weapon involved as possible reward for turnin (can we confirm it's in?).
http://everquest.allakhazam.com/db/item.html?item=638