Merge pull request modelcontextprotocol#768 from modelcontextprotocol/basil/changelog_additions

changelog additions

Author: ihrpr

docs/specification/draft/changelog.mdx

@@ -9,26 +9,35 @@ the previous revision, [2025-03-26](/specification/2025-03-26).
 
 ## Major changes
 
-1. Removed support for JSON-RPC **[batching](https://www.jsonrpc.org/specification#batch)**
+1. Remove support for JSON-RPC **[batching](https://www.jsonrpc.org/specification#batch)**
    (PR [#416](https://github.com/modelcontextprotocol/specification/pull/416))
-2. Added support for [structured tool output](/specification/draft/server/tools#structured-content)
+2. Add support for [structured tool output](/specification/draft/server/tools#structured-content)
    (PR [#371](https://github.com/modelcontextprotocol/modelcontextprotocol/pull/371))
-3. Classified MCP servers as [OAuth Resource Servers](/specification/draft/basic/authorization#authorization-server-discovery),
+3. Classify MCP servers as [OAuth Resource Servers](/specification/draft/basic/authorization#authorization-server-discovery),
    adding protected resource metadata to discover the corresponding Authorization server.
    (PR [#338](https://github.com/modelcontextprotocol/modelcontextprotocol/pull/338))
 4. Require MCP clients to implement Resource Indicators as described in [RFC 8707](https://www.rfc-editor.org/rfc/rfc8707.html) to prevent
    malicious servers from obtaining access tokens.
    (PR [#734](https://github.com/modelcontextprotocol/modelcontextprotocol/pull/734))
-5. Clarified [security considerations](/specification/draft/basic/authorization#security-considerations) and best practices
+5. Clarify [security considerations](/specification/draft/basic/authorization#security-considerations) and best practices
    in the authorization spec and in a new [security best practices page](/specification/draft/basic/security_best_practices).
-6. Added support for **[elicitation](/specification/draft/client/elicitation)**, enabling servers to request additional
+6. Add support for **[elicitation](/specification/draft/client/elicitation)**, enabling servers to request additional
    information from users during interactions.
    (PR [#382](https://github.com/modelcontextprotocol/modelcontextprotocol/pull/382))
-7. Added support for **[resource links](/specification/draft/server/tools#resource-links)** in
+7. Add support for **[resource links](/specification/draft/server/tools#resource-links)** in
    tool call results. (PR [#603](https://github.com/modelcontextprotocol/modelcontextprotocol/pull/603))
+8. Require [negotiated protocol version to be specified](/specification/draft/basic/transports#protocol-version-header)
+   via `MCP-Protocol-Version` header in subsequent requests when using HTTP (PR [#548](https://github.com/modelcontextprotocol/modelcontextprotocol/pull/548)).
 
 ## Other schema changes
 
+1. Add `_meta` field to additional interface types (PR [#710](https://github.com/modelcontextprotocol/modelcontextprotocol/pull/710)),
+   and specify [proper usage](/specification/draft/basic#meta).
+2. Add `context` field to `CompletionRequest`, providing for completion requests to include
+   previously-resolved variables (PR [#598](https://github.com/modelcontextprotocol/modelcontextprotocol/pull/598)).
+3. Add `title` field for human-friendly display names, so that `name` can be used as a programmatic
+   identifier (PR [#663](https://github.com/modelcontextprotocol/modelcontextprotocol/pull/663))
+
 ## Full changelog
 
 For a complete list of all changes that have been made since the last protocol revision,