What is the origin of the idiom "call the shots" and when to use it?

The origin of the idiom "call the shots" can be traced back to the sport of billiards or pool. In billiards, the player who "calls the shots" is the one who declares which ball they intend to hit and into which pocket it will go. By doing so, they take control of the game and determine the sequence of shots. It is often used when discussing leadership roles, management positions, or situations where one is responsible for directing and determining the course of action.