Which type of agent acts with limited authority and primarily serves as an intermediary?

The correct choice, which identifies the type of agent that acts with limited authority and primarily serves as an intermediary, is indeed a special agent. A special agent is appointed for a specific task or transaction and operates within the constraints defined by the principal in that context. This limited authority distinguishes them from other types of agents.

Universal agents possess broad authority to act on behalf of the principal in any matter, which is not applicable to the scenario described. General agents, while they can manage a range of activities for a principal, do so with a wider scope of authority than what is described for intermediaries. Intra-company agents generally refer to representatives within an organization facilitating transactions or operations, lacking the intermediary role defined for special agents.

In summary, special agents serve specific functions with defined limitations, making them the correct answer for this question.