The Governed Execution Gateway: Securing MCP Servers and Tool Egress Proxies

The article proposes a Governed Execution Gateway for MCP deployments: a bidirectional proxy for validating tool calls, filtering tool outputs, and centralizing telemetry.

It recommends mTLS or scoped tokens, strict payload inspection, rate limits, and loop breakers as baseline controls.

The goal is to stop prompt injection, data leakage, and runaway agent behavior when AI tools access enterprise systems.

As MCP adoption grows, a governed gateway is framed as the security layer that adds inspection, policy enforcement, and auditability.