Simon Willison shares his renewed enthusiasm for MCP (Model Context Protocol) following the release of the stateless MCP 2.0 specification (2026-07-28). The new spec simplifies both client and server implementations by eliminating the session initialization handshake, reducing tool calls to a single HTTP request. He built three projects in response: mcp-explorer (a CLI tool for interactively probing MCP servers), datasette-mcp (a Datasette plugin exposing SQL query tools via MCP), and llm-mcp-client (an alpha plugin for his LLM tool). He also argues that MCP offers a safer alternative to giving agents arbitrary shell and curl access, since MCP tools are easier to audit, control, and reason about from a security perspective.
5 Impressions