AI agents executing tools expose your SSH keys and .env files to prompt injection. Agent Wall is an open-source firewall for MCP servers that intercepts every tool call. It enforces a 5-step defense pipeline: 1. Detects 30+ injection patterns 2. Blocks SSRF & private IPs 3. Enforces YAML policies & rate limits 4. Spots attack chains 5. Redacts secrets & PII Secure your AI tool execution layer now.