I think it wouldn't be a great idea to allow someone total control over their descs on forms, and it is too much to ask the imms to police something like that. First of all, you'll have people that are just plain wrong. For instance, I have heard alot of people call a lemur a rat or rodent, except it is actually a monkey. So now you have someone with a description saying this thing has whiskers, pointy teeth and a hairless tail...not exactly a monkey. Then there is the problem of short names...if you rename your form, which names still work? You name a diamondback a multicolored snake, does diamondback still work, or only snake now? And how many people actually know what all of the forms even look like besides a basic concept of, cat, bird, snake etc? The idea below of allowing certain characteristics to be chosen I can maybe see, maybe, but not the sort of control you're talking about.

"Knowledge speaks, but wisdom listens." - Jimi Hendrix