Yes; normally ATC avoid the uncertainty, by giving you descents all the way to the platform, before giving you “cleared for the approach”. I am with you there. But if were not the case, e.g. I am at 4000, he says “cleared for the approach”, but the “platform altitude” is 3000, I would definitely query if I may desend to 3000 (and not just do do it). As said, you are...