MCP server
A Model Context Protocol server: a process that exposes tools, resources, and prompts to an LLM agent over a standardized JSON-RPC interface.
A Model Context Protocol (MCP) server is a long-running process that an agent like Claude Code or Cursor connects to over JSON-RPC. The server publishes a manifest of tools the agent can call, resources it can read, and prompts it can request — and the host application (the agent) decides when to invoke them mid-session.
Placeholder body. Replace with the full glossary entry per the playbook §9 outline.
When to build one
- You have domain knowledge the agent cannot derive from reading files alone.
- The data updates fast enough that re-reading files would burn context.
- You want deterministic, audit-logged tool boundaries between the agent and your system.