MCP Gateway

TL;DR * MCP guardrails validate tool arguments before a call executes and tool results after it returns, a boundary that LLM-only content filters never inspect. * Bifrost evaluates MCP guardrail rules with CEL expressions matched against mcp_client, mcp_tool, and mcp_arguments, then routes matches to one or more

TL;DR * An MCP registry is a discoverable, versioned catalog of Model Context Protocol servers, listing each server's capabilities, authentication requirements, and status so engineers can find and use approved tools without ad-hoc requests. * The official MCP Registry launched in preview on September 8, 2025 as an

This guide walks through how a proxy handles a tool call, bridges stdio and Streamable HTTP, aggregates servers, and avoids the confused deputy and token passthrough risks named in the MCP spec, plus the signals that mean it is time for an MCP gateway

TL;DR: Connecting each MCP server directly to every client means duplicated configuration, scattered credentials, no shared access control, and hundreds of tool definitions loaded into every request.An MCP gateway aggregates every connected server behind one endpoint, so clients point at a single URL while the gateway handles discovery,

TL;DR * A malicious or compromised MCP server's primary attack is secret exfiltration: it reads the tokens and API keys your agent holds and sends them to an external endpoint. The OWASP MCP Top 10 ranks token mismanagement and secret exposure as the largest risk in the Model

A comparison of five MCP governance tools by the layer each one governs and whether it enforces policy on every device in the fleet.