mcp-server-capabilities

MCP server capabilities provide URI-based data access for agent-host interactions. The server defines a resources surface with URI validation and access controls, enabling agents to read live contextual data directly from the server.

Reusable prompt templates are supported through centralized server-side prompts. Agents can fetch and apply these standardized templates across varied use cases, ensuring consistent prompt execution and coordinated agent-host interactions.

Server-initiated sampling allows an MCP server to request the host to run LLM completions. You need this capability when heavy reasoning or server-initiated intelligence is required, offloading completion requests from server to host.

MCP elicitation allows the server to prompt the host to collect user input when needed during agent interactions. It provides a defined surface for requesting information, functioning alongside resources, prompts, and sampling capabilities.

The MCP server capabilities framework includes URI validation and access controls for data reading. These controls maintain safe access across resources, prompts, sampling, and elicitation during server-client agent interactions.

Use MCP sampling to coordinate server-initiated completions by having the server request the host to run LLM completions. This framework provides a defined surface for server-client intelligence while maintaining access controls.