Versioning & change policy

• MCP protocol version is 2025-03-26. Send it in the initialize request as shown in Connect programmatically.
• The MCP endpoint path is /v1/sse. The /v1 prefix is stable; a future major transport change would ship under a new prefix and run in parallel during a deprecation window.
• Additive changes — new optional tool arguments, new fields in results, new tools — may land without prior notice. Parse leniently and ignore fields you do not recognize.
• Breaking changes — removing or renaming a tool or argument, tightening required constraints — will be communicated to partners ahead of time with a migration window.