What should the referee do when an outside agent is on the field?

When an outside agent is on the field, the appropriate action for the referee is to stop the game immediately. This response is crucial for maintaining the safety and integrity of the game. An outside agent can present potential risks to the players, officials, and spectators, and their presence on the field can disrupt the flow of the match. By halting the game, the referee ensures that the situation is addressed safely and appropriately, allowing for any necessary actions to be taken, such as removing the agent from the field or assessing the impact on the ongoing match. The referee’s authority in this situation is vital for upholding the rules and ensuring that the game is played in a controlled and secure environment.