/key will report keys already on your key ring. Unfortunately, most keys have to be used before they appear on the keyring, and some of the keyring names are nothing similar to the actual key names, but many are the same. However, you should be able to determine several you can delete, and some posts on the key pages list the keyring text so you might be able to delete some more.
The ones that come to mind off-hand that don't go on the keyring are the Najena keys, and most of the PoP keys that aren't alternate access quests instead of doing raid progression, such as Aeryn'Dar key, Agnar key, Upper bot key, etc.
Friar Bijou wrote: