In reading the docs, it doesn't look like the MCP server supports the Ask Sourcebot capability. Is that correct or am I missing something in the docs? Is that planned to be added?

Yea they are currently separate - the MCP server exposes out the same tools that Ask Sourcebot uses, but the actual LLMs call is on the MCP client. It would be interesting to merge them though - maybe have a Exa style MCP tool that lets MCP clients ask questions similar to how we are doing it with Ask Sourcebot.

Would be great to hear more about your use case though.