blackshoe, on 2020-February-29, 13:41, said:
Are those, in your view, the only two options?
In most cases I don't think it's either.
If declarer knows what's going to happen after he finished running the suit, they should just make a claim: "I'm going to run the clubs, discarding X and Y, then take A and B."
But in many cases declarer has to watch the opponents' cards carefully, and make appropriate discards, while running the suit. They might be hoping for a squeeze to materialize, for instance, or just trying to get a count of the hand.
The only point of saying "run the clubs" is that it's a convenient shorthand. And if anything, it should be helpful to the defenders, as they can think ahead about all their discards. But most of the time it will be pretty obvious that when there's a long, runnable suit in dummy, declarer is probably going to run it (not always -- sometimes declarer is concerned about squeezing themselves).