A ski expedition is a set of answers that still make sense when a road is closed. These are the questions worth writing down before anyone talks about a price. The travel guide carries the same list in longer form.
Which mountain, in which month
Damavand, Alam Kuh, Zard Kuh, and Dena are not interchangeable. Name one. Then name a month, and accept that the month is a window, not a summit date. Spring is often discussed for the higher objectives because the days are longer. That sentence is not a forecast.
What your passport requires
Visa rules depend on nationality and they change. The only useful step is to ask the Iranian representation responsible for your passport, before flights are bought. This site will not print a table of exemptions. A wrong table travels further than a careful refusal.
Read your own government’s travel advice as well. It is a separate document from a snow plan.
What the insurance schedule actually says
Ask, in writing, whether ski mountaineering in unsecured terrain is covered at the height you intend, and what an evacuation costs beyond the policy. “We go to the mountains sometimes” is not a question an insurer can answer. Many travel policies stop at the resort boundary, and these journeys are not inside one.
Who decides, and who speaks
Agree who can cancel a day. If nobody in the party speaks Persian, say so at the inquiry stage rather than at a checkpoint. The mountains are not an English-speaking service area.
What you have already skied
The inquiry asks for an experience level because a Damavand project and a first ski tour are a bad pairing. Describe ranges, seasons, and whether you have slept high. A label from a form is less useful than three honest sentences.
When those answers exist, there is something to plan. Until they do, an itinerary would be decoration.