Gemini 3 not working for toolcaling mcps

Where does the bug appear (feature/product)?

Cursor IDE

Describe the Bug

I tried Gemini 3, but it doesnt work when I want to make a mcp toolcall. There comes an error message - pleas switch model or disable mcps… ??

Steps to Reproduce

ask gemini 3 to use mcp server…

Expected Behavior

it doesnt work at all

Screenshots / Screen Recordings

Operating System

Windows 10/11

Current Cursor Version (Menu → About Cursor → Copy)

Version: 2.0.77 (user setup)
VSCode Version: 1.99.3
Commit: ba90f2f88e4911312761abab9492c42442117cf0
Date: 2025-11-13T23:10:43.113Z
Electron: 37.7.0
Chromium: 138.0.7204.251
Node.js: 22.20.0
V8: 13.8.258.32-electron.0
OS: Windows_NT x64 10.0.26200

For AI issues: which model did you use?

Gemini 3

For AI issues: add Request ID with privacy disabled

daa27522-0e7b-4580-8742-8dd713ee22e3

Does this stop you from using Cursor

Sometimes - I can sometimes use Cursor

Hey, thanks for the report. The team is aware of this issue and is working on a fix.