MCP Elicitation: User interaction / human-in-the-loop

[amotl]

About

The MCP protocol gained an elicitation feature.

MCP Elicitation: Human-in-the-Loop for MCP Servers.

Details

The Model Context Protocol (MCP) provides a standardized way for servers to request additional information from users through the client during interactions. This flow allows clients to maintain control over user interactions and data sharing while enabling servers to gather necessary information dynamically.

Elicitation supports two modes:

• Form mode: Servers can request structured data from users with optional JSON schemas to validate responses
• URL mode: Servers can direct users to external URLs for sensitive interactions that must not pass through the MCP client

References

• https://modelcontextprotocol.io/specification/draft/client/elicitation
• https://gofastmcp.com/clients/elicitation
• https://fast-agent.ai/mcp/elicitations/
• https://workos.com/blog/mcp-elicitation
• https://dev.to/kachurun/mcp-elicitation-human-in-the-loop-for-mcp-servers-m6a
• https://github.blog/ai-and-ml/github-copilot/building-smarter-interactions-with-mcp-elicitation-from-clunky-tool-calls-to-seamless-user-experiences/
• https://medium.com/@daiki.yamashita_67366/using-mcp-elicitation-to-collect-additional-information-from-the-user-d5c599ecae77