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Documentation Index#
Fetch the complete documentation index at: https://modelcontextprotocol.io/llms.txt Use this file to discover all available pages before exploring further.

Protocol Revision: 2025-11-25

Servers provide the fundamental building blocks for adding context to language models via MCP. These primitives enable rich interactions between clients, servers, and language models:

Prompts: Pre-defined templates or instructions that guide language model interactions
Resources: Structured data or content that provides additional context to the model
Tools: Executable functions that allow models to perform actions or retrieve information

Each primitive can be summarized in the following control hierarchy:

Primitive	Control	Description	Example
Prompts	User-controlled	Interactive templates invoked by user choice	Slash commands, menu options
Resources	Application-controlled	Contextual data attached and managed by the client	File contents, git history
Tools	Model-controlled	Functions exposed to the LLM to take actions	API POST requests, file writing

Explore these key primitives in more detail below:

Link last verified June 7, 2026. View original ↗

Source: MCP Docs

Link last verified: 2026-02-26