I have some cognitive deficits that aren't super noticeable in on the fly RP (I don't think) but can be amplified in STed scenes (which tend to be time-limited/have more moving parts such as needing to figure out actions/rolls/ect not just RP).
Therefore I really appreciate when GMs lay out their expectations at the start, rather than assume that I will figure out what they expect while we're doing it. Sometimes I can, but it might come slowly and that's just frustrating to everyone (and I don't like annoying people).
I really super appreciate time limits, especially those that are announced in advance, because it helps me know if/how long I need to set a timer for. It's also helpful if they give clear and concise directions (Page me your actions now, you have Y minutes to do so. Hold poses until you see X. Now we are in free play/now we aren't.) That type of thing. My cognitive issues are not helped by stress, so knowing what's expected helps me just do better in general. And knowing timing up front means that I can employ tools like setting timers and the like that help it be so that people in the scene/hopefully the GM too just don't notice it at all.
When I GM for people I try to be up front with all those things too. I do set time limits for responses. I do move on after my set time limit. I try to put a hard time block around a scene and let people know. Sometimes people have become upset with me (Especially the first time that they're passed over for their action because they weren't responding to me in time, or if we start on time and I'd not heard from them so I didn't hold the scene start). But I find when I don't have clear boundaries and follow them that more people don't have a good time because it becomes too long/by the time we get to resolution it's too late for people to pay attention/people get annoyed and bored waiting on stragglers, ect.)
But in the sense of the more general expectations (personal tailoring, ect), that's often so dependent on the individual scene/chemistry of the people involved that I usually don't feel comfortable laying that out like a law. Instead I often put out my goals for the scene (First/Last step to resolve a specific crisis; bringing a group of specific PCs together to help them mesh for a story development, exploration, honoring a specific person's request, ect) out there before people sign up so that we're on the general same page. And I always say my time limits and preferred procedure up front (and expect to do some reminders for the first part of things).