Imperium MCP Security — Prompt-Injection, Jailbreak & Tool Poisoning Firewall for Gemini CLI

dev.agentdiet/mcp-security

Real-time MCP & A2A prompt-injection, jailbreak, and tool-schema poisoning firewall for AI agents.

client:Gemini CLI transport:streamable-http tools:2

Install Imperium MCP Security — Prompt-Injection, Jailbreak & Tool Poisoning Firewall in Gemini CLI

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

{
  "mcpServers": {
    "mcp-security": {
      "httpUrl": "https://mcp-security.agentdiet.dev/mcp"
    }
  }
}

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