Gemini CLI 3TG Test Generation create_spec

How to: Gemini CLI 3TG Test Generation create_spec

client:Gemini CLI transport:streamable-http tool:create_spec

Add 3TG Test Generation to Gemini CLI

01
Open ~/.gemini/settings.json and merge this in. Keep any servers already there.

{
  "mcpServers": {
    "mcp": {
      "httpUrl": "https://mcp.3tg.dev/mcp"
    }
  }
}

02
Save the file and restart Gemini CLI.
03
Ask for something create_spec does. Gemini CLI lists the server's tools on connect and calls create_spec itself — you do not invoke it by name.
04
If nothing happens, check the server is running and that 3TG Test Generation's identifier in your config matches the one above exactly.

Gemini expands $VAR and ${VAR} inside env values, so a secret can live in your shell rather than this file. Gemini CLI docs

Same tool, other clients

This list was read from the server itself, by connecting to it and calling tools/list on 24 September 2026. It is what the server actually exposes, not what its listing claims.

Mutating and Read-only are read off each tool's name, not its schema — a hint, not a guarantee. The registry stores tool names only; connect the server for its live schemas.

3TG Test Generation MCP server