AIMS?

You're right about the involuntary movements and psychotropic drugs parts, but the AIMS isn't intended to measure EPS (extrapyramidal symptoms), which are temporary and treatable -- it's intended to evaluate for tardive dyskinesia, which is the permanent, irreversible neurological damage caused by antipsychotics. The idea is to catch any indications of TD as early as possible so that the medication regimen can be reviewed and changes made, if possible, to prevent or minimize further damage and, eventually, disability, and to continue to track the development/progression of TD sxs over time.

OP, the AIMS test is available as a form with written instructions on how to administer and score it (although it helps to be familiar with the sxs it's measuring). I'm sure it would be pretty easy to track down.

EPS and TD are both caused by neuroleptic use (antipsychotics and some other related medications), EPS tend to appear earlier than sxs of TD, and the sxs of both resemble each other to some extent, but the two separate, different disorders are not necessarily related to each other. It is entirely possible (common, even) to have either one without the other. EPS are certainly a concern and should be treated, but that doesn't really have anything to do with whether someone is going to (also) develop TD. TD is the really scary one of the two.

(I don't mean to sound like a pain in the butt know-it-all :), but psych has been my specialty for a long time and I know there's a lot of confusion and misunderstanding about this particular subject. I'll shut up now. :)).