Skip to content
mcp/harbor

Gemini CLI kernelcad why_did_this_fail

How to: Gemini CLI kernelcad why_did_this_fail

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

Add kernelcad to Gemini CLI

  1. 01

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

{
  "mcpServers": {
    "kernelcad": {
      "httpUrl": "https://mcp.kernelcad.com/mcp"
    }
  }
}
  1. 02

    Save the file and restart Gemini CLI.

  2. 03

    Ask for something why_did_this_fail does. Gemini CLI lists the server's tools on connect and calls why_did_this_fail itself — you do not invoke it by name.

  3. 04

    If nothing happens, check the server is running and that kernelcad'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.

kernelcad MCP server