Gemini CLI encounters 400 error with > 128 tools
Author: gundermancCreated Mar 30, 2026Updated Sep 17, 2026
Labelspriority/p2area/agent🔒 maintainer onlyworkstream-rollupstatus/bot-triagedkind/bugstatus/need-information
What happened?
Gemini CLI encounters a 400 error when there are more than 400 tools available.
What did you expect to happen?
I'd expect the agent to be a bit smarter about limiting tools in scope of enabled tools.
Client information
Client InformationRun gemini to enter the interactive CLI, then run the /about command.
> /about
# paste output hereLogin information
No response
Anything else we need to know?
No response
Source: google-gemini/gemini-cli