cleanup changelog

Author: pcarleton

docs/specification/draft/changelog.mdx

@@ -3,34 +3,17 @@ title: Key Changes
 ---
 
 This document lists changes made to the Model Context Protocol (MCP) specification since
-the previous revision, [2024-11-05](/specification/2024-11-05).
+the previous revision, [2025-03-26](/specification/2025-03-26).
 
 ## Major changes
 
-1. Added a comprehensive **[authorization framework](/specification/draft/basic/authorization)**
-   based on OAuth 2.1 (PR
-   [#133](https://github.com/modelcontextprotocol/specification/pull/133))
-1. Replaced the previous HTTP+SSE transport with a more flexible **[Streamable HTTP
-   transport](/specification/draft/basic/transports#streamable-http)** (PR
-   [#206](https://github.com/modelcontextprotocol/specification/pull/206))
-1. Added support for JSON-RPC **[batching](https://www.jsonrpc.org/specification#batch)**
-   (PR [#228](https://github.com/modelcontextprotocol/specification/pull/228))
-1. Added comprehensive **tool annotations** for better describing tool behavior, like
-   whether it is read-only or destructive (PR
-   [#185](https://github.com/modelcontextprotocol/specification/pull/185))
+1. TODO
 
 ## Other schema changes
 
-- Added `message` field to `ProgressNotification` to provide descriptive status updates
-- Added support for audio data, joining the existing text and image content types
-- Added `completions` capability to explicitly indicate support for argument
-  autocompletion suggestions
-
-See
-[the updated schema](http://github.com/modelcontextprotocol/specification/tree/main/schema/draft/schema.ts)
-for more details.
+- TODO
 
 ## Full changelog
 
 For a complete list of all changes that have been made since the last protocol revision,
-[see GitHub](https://github.com/modelcontextprotocol/specification/compare/2024-11-05...draft).
+[see GitHub](https://github.com/modelcontextprotocol/specification/compare/2025-03-26...draft).