I'm sure this is right, but it's not entirely practical. I regularly direct games with a player whose eyesight is non-existent for the purposes of seeing dummy or the cards played by other players. He manages to keep up, but only just, as having the dummy described to him and all the played cards called slows things down a bit. If he wasn't allowed to have dummy described in shorthand it would slow things down further. His regular partners would say something like "King one, two small, Ace Jack to seven, two small", and he would check by saying "that's a 2272 five-count with Ace Jack of diamonds?"