MCP Spec 2025-11-25 Deprecates Batch Requests and Features Elicitation

·2026.11.05 23:08

Key point

The November 2025 Model Context Protocol specification deprecates batch requests and introduces elicitation for server-to-user interaction.

Spec version 2025-11-25 marks the current default, with a next release planned for March 2027.
Batch requests are deprecated in favor of individual message handling, while the protocol retains stdio and Streamable HTTP transports.
New client features include Elicitation, allowing servers to ask users for input, and Roots, defining where servers may operate.
Security sections address tool poisoning, tool shadowing, and prompt injection through tool results.
Extensions in beta or stable status include Skills over MCP, MCP Apps, and Server Cards.

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