BarzelVault: AI Action Authorization Firewall for Gemini CLI

io.github.realbizdigital/barzelvault-mcp

Authorize AI agent tool calls before they run: policy-as-code, human approval, signed receipts.

client:Gemini CLI transport:streamable-http

Install BarzelVault: AI Action Authorization Firewall in Gemini CLI

~/.gemini/settings.json · windows: %USERPROFILE%\.gemini\settings.json

{
  "mcpServers": {
    "barzelvault-mcp": {
      "httpUrl": "https://barzelvault-mcp.mcpize.run/mcp"
    }
  }
}

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