Niels Provos Deploys IronCurtain To Block Rogue Agents

Veteran security engineer Niels Provos is developing IronCurtain, an open-source tool to stop autonomous LLM agents from taking unauthorized actions. It routes agent-generated TypeScript and MCP tool-call requests through a trusted proxy policy engine that enforces a user-written 'constitution', verifies rules with a compiler LLM and test scenarios, and blocks or escalates requests. The early research release invites developer testing and feedback.