Hey, thanks for the report. This is a known issue with MCP tool discovery, the team is aware and looking into it.
What’s happening: MCP servers connect fine and the tools do get registered (you can see it in the logs), but the agent can’t see them. Based on other reports, this bug showed up sometime between 2.3.34 and 2.3.41.
Try these workarounds:
-
Start a new chat and ask: “list all MCP tools you have access to”
After that, it may start working in the same session. -
Downgrade to 2.3.34 or 2.3.35. Many users confirm it works there. Older versions are here: Downloads | Cursor Docs
If the workaround doesn’t help, can you share the Request ID from the broken chat (three dots in the top right of the chat > Copy Request ID). That’ll help the team debug.
Related threads with the same issue:
- Agent chat "No MCP resources available" when trying to use MCP
- MCP server tools not exposed to AI agent despite successful connection
Let me know if the workaround doesn’t help or if you need more info.