When warden you should be saying it first. Or thats just a me thing idk. But once the game is played I believe it would be modifying specially vs sentry
You should always say it before the game starts, like for example in climb/vs sentry it matters a lot.
However in minigames like crush game/nine square it wouldn't matter much.
But you would still be breaking the rules by saying the command in the middle of the minigame, so always say it before the game starts.
Hope this helps