Client Setup: Gemini CLI

Official references

• https://geminicli.com/docs/
• https://geminicli.com/docs/tools/mcp-server/
• https://github.com/google-gemini/gemini-cli

Status

• Confidence: High (official docs and repo references).

Integration notes

• Register as stdio MCP server.
• Validate via Gemini CLI MCP diagnostics commands.
• Function declaration schemas are published in a Vertex/Gemini-friendly shape: optional parameters use an explicit type plus nullable: true, not nullable anyOf wrappers. If diagnostics fail, inspect tools/list and confirm consensus_answer.method is a nullable string enum.

Example (~/.gemini/settings.json → mcpServers)

"reasonkit-think": {
  "command": "/ABSOLUTE/PATH/TO/reasonkit-think-mcp",
  "args": [],
  "env": { "TMPDIR": "/tmp" },
  "trust": true
}

Multi-client reference: root README.md.

Verification checklist

• server listed
• tools callable
• resources retrievable