How do you secure LangChain tools from rogue execution or prompt injection?

Out of the box, LangChain connects LLMs directly to APIs with zero middleware. If an attacker uses indirect prompt injection, or if the model simply hallucinates, it will execute destructive tools (like dropping a database or sending unauthorized emails) immediately.

To secure LangChain tools, you must implement an Operational Boundary.

Layer 3 of the Exogram Control Plane acts as a firewall for AI agents. You wrap your LangChain tools with the Exogram SDK. When the agent attempts an action, Exogram mathematically evaluates the payload against strict, un-promptable policies. If it's malicious, Exogram blocks it. The agent executes, but Exogram governs.