Final answer:
Jonathan is acting as Sven's agent or representative to find a castle, which involves managing affairs on Sven's behalf in the Hollywood context.
Step-by-step explanation:
Jonathan is acting as Sven's agent or representative in the task of finding a castle in the Hills. An agent or representative is someone who acts on behalf of another person, handling affairs, making deals, or performing tasks with the authority given by the person they represent.
In the context of Hollywood, an agent usually deals with contracts, property purchases, public relations, and other business-related tasks on behalf of their celebrity clients.