Top 5 MCP Gateways for Routing Tools and Context Across LLM Agents

If you are building agentic workflows where multiple LLM agents need to share tools and context, you have probably hit this wall already: tool definitions bloat your context window, routing logic gets hardcoded, and there is no clean way to control which agent gets access to what. Model Context Protocol (MCP) solves the standardization problem. But MCP alone does not solve routing, governance, or performance at scale. For that, you need something sitting between your agents and your MCP servers.