A professional-services firm wants an agent to file time entries in a billing system that has no API and no connector. Staff can enter time only through the system's browser screens. Which extension should the architect choose?
Select an answer to reveal the explanation.
Short Explanation
When the only door is the same screen a person clicks, you send an agent that can use that screen. You choose Computer Use because staff can file time only through the browser screens. A protocol server still needs something on the other side that speaks the protocol.
Full Explanation
Computer Use is the Copilot Studio capability for driving an application or website through its user interface when no API is available. The billing system matches that constraint: browser screens only, and no API a maker can call. A Model Context Protocol server is the right extension when a system exposes tools through MCP, and this billing system exposes nothing of the kind. A prompt action can classify or draft text, but it does not press the buttons that file a time entry. A custom language model does not gain an API the vendor never published, and screen entry is an interface problem, not a missing language skill. The agent still has to press the same buttons a person presses, which is why the pilot reviews each entry. Exam caveat: Computer Use operates the same screens a person uses, so the pilot should review each filed entry before the agent posts billable time. Operational check: confirm there is still no supported API, then pilot Computer Use against a test company in the billing system and review each filed entry before enabling it for billable work.