What is an MCP server and why does it need documentation?
· 9 min read
Most teams shipping AI products in 2026 are focused on the model. Which one to use, how to fine-tune it, how to evaluate its outputs. What they are not focused on, almost universally, is the layer that connects the model to everything else.
That layer is the MCP server. And almost nobody is documenting it.
This is a problem. Not an inconvenience but a genuine technical risk, and in regulated industries, a compliance risk too. A developer joining a project finds an MCP server in the codebase with no tool reference, no input schema, no error documentation. The model is using it. Nobody knows exactly how. The person who built it left six months ago.