What Is Model Context Protocol?

Model Context Protocol, usually shortened to MCP, is an open standard for connecting AI applications with the places where useful data and tools already live.

The basic architecture has hosts, clients, and servers. A server exposes a capability such as files, database queries, repository access, business records, or a tool action; an AI client can then request that capability through the protocol.

MCP matters because every AI product should not need a custom integration for every data source. A standard interface lets multiple AI clients reuse the same server rather than rebuilding one-off connectors.

For users, MCP is most visible in coding tools, desktop assistants, enterprise search, and internal automation. The practical question is not only whether a tool supports MCP, but what permissions the connected server receives.