From now on, all disguises will behave this way, forcing your description to a preset determined by the item in question. You won't be able to change it but you can still set your @shortdesc. We're looking to add more details about the disguise in the description, such as its name and color
Keep in mind that both the shortdesc and the description should be used to try to figure out if you know who someone is. Be reasonable. Disguises are very common and the city is crammed full of people, so it's not reasonable to be certain about who anyone is with a functional, generic disguise on unless something is an IC giveaway. You'd be surprised how easily you can make a wrong OOC assumption anyway. The tools we give you are not a license to be meta.
With that said, your build and gender will remain in your shortdesc and we don't plan to remove them or replace them with neutral adjectives or nouns. On the other hand, manually changing your @shortdesc is part of how you can make it that less likely that someone will guess who you are.
I'll be working on updating related helpfiles. Let me know if I miss any.
Please post your feedback and questions in this thread. :)