Glossary · AI and language-model infrastructure
Model Context Protocol
A client-server protocol that lets AI applications discover approved tools, resources, and prompt templates through defined connections.
Also called: MCP
Definition
Model Context Protocol defines how an MCP host and client communicate with one or more MCP servers. Servers can expose tools for actions, resources for context, and prompts for reusable interaction templates. The protocol also defines lifecycle and transport behavior; SDKs implement those rules for specific languages.
Why it matters
MCP can make approved business systems available through one consistent interface while preserving a visible boundary around each server's capabilities.
Common misunderstanding
Connecting an MCP server does not grant unlimited authority. The server exposes only defined capabilities, and the host, user, authentication, permissions, and application policy still govern use.
Related terms
Related system family: Operations & Automation
Sources
- Model Context Protocol architecture overview (opens in a new tab) · Model Context Protocol
Last reviewed July 16, 2026