Al Evans comments on the forums about GM’s Rolling Dice for Players
I GM online, specifically on Roll 20, so skill checks perception… are divided, arbitrarily by me, into two groups:
Things that change the roleplay, like intimidate, are GM rolls that the player sees but not the other players. It is the difference between “Stinky the Dwarf sidles up to the guard, stroking his axe and muttering ‘Wait until we hear his answer sweety’” and “Knuckles the thief minces up to the guard, reaches for his buckle knife and accidentally drops his pants.”
Things that change the characters health etc., like climbing a wall, are handled with an API script BlindRoll!, only the GM sees the roll. That is the difference between ” I carefully inch up the wall 5 frrt and then slowly move north along the wall.” and “You get about halfway up the 50’ wall when your suddenly pitching backwards with a loose stone in your hand you take twelve damage and roll a Con save.”