Cursor-agent CLI: MCP tool calls silently stopped working in 2026.04.17

[Colin]

Hey there @kevglynn

Thanks for the report! I believe this is quite a recent regression! We have an open bug ticket tracking reports of this, along with a few other forum threads.

(URGENT) Cursor CLI not including MCPs in CI mode in first prompt

Where does the bug appear (feature/product)? Cursor CLI Describe the Bug No mcp tools available in CI mode Steps to Reproduce root@061a9c31eaac:/workspaces/task-bug# agent create-chat 9fc70ebd-2e0b-4971-8d42-ab211339d611 root@061a9c31eaac:/workspaces/task-bug# agent --resume=9fc70ebd-2e0b-4971-8d42-ab211339d611 --approve-mcps --force -p "please list your mcp tools" Here is what applies in **this** session: ### What I can see - There is **no** built-in “list all MCP tools” call on my side. Too…

Cursor CLI 2026.04.17-787b533: MCP tools disappear from toolset in -p mode when multiple stdio MCP servers are configured (race condition)

Where does the bug appear (feature/product)? Cursor CLI Describe the Bug Summary In Cursor CLI 2026.04.17-787b533, running agent -p --approve-mcps … with multiple stdio MCP servers configured in .cursor/mcp.json intermittently delivers an empty MCP toolset to the model even though every server reports ready via agent mcp list and all tools are visible via agent mcp list-tools . Version 2026.04.15-dccdccd does not exhibit this behaviour with the same configuration. The symptom is: the model an…

We’ll update these threads when a fix is available.