Can Cass predict what your character is thinking/planning/doing? T'Pol would be a little harder for her than most, I think, because as a Vulcan she's all about not expressing emotion and such. But she's kind of an emotional Vulcan, and I usually put in little eyebrow arches and such and note what you can read into them.
If yes, what limitations do you have on this? I'd say free reign, unless I ping you about it? I can't think of a situation where I'd be like NO DON'T DO IT but just in case. :p
Is there anything you'd rather she not be able to predict? Nope!
Anything else? <3