Why MCP alone isn't enough: the tooling layer behind production agents at enterprise scale
Expensive-Insect-317 · reddit · 2026-10-13
Connecting an LLM to a few APIs is easy; scaling to hundreds of enterprise tools is a different challenge. The author shares an article on the tooling layer behind production agents, illustrated by a layered architecture diagram.
Topics covered:
- Tool discovery and registries so agents can find and understand available tools
- Authorization and policy controls over what agents may invoke
- Execution, reliability, and versioning
- Observability for production monitoring
- The takeaway: MCP alone doesn't solve the whole problem
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