Oooh! I misread it completely. I thought "at the direction of another" meant something like "towards someone else" (and was supposed to be "in the direction of", since it was followed by "like an encouragement...". I thought the affected creature was the one doing the encouragement/order. I think it should then be "under the direction of another creature" rather than "at". Thank you for the clarification. It makes much more sense now. I still think it should be further clarified to "[...] to all rolls made while acting under the direction of another [...]".