Create a Message changedapi/beta/messages/create
Nearest release: v2.1.277, published 4 hours before this site recorded the change. Shown because the two are within 24 hours of each other. Nothing here says the release caused the edit.
Recorded here
Lines+2added
Lines−2removed
From line
1,316
where the diff opens
First seen
14 Aug 2026
this site's first read of the page
Recorded edits34to this page, all time
The whole hunk
from line 1316, old and new numbered
/
from line 1316
13161316
13171317 - `BetaToolChangeMCPToolReference object`
13181318
1319 Reference to a single MCP tool by its server and remote name — the
1319 Reference to a single MCP tool by its server and remote name; the
13201320 same `server_name`/`name` pair `mcp_tool_use` carries.
13211321
13221322 - `type: "mcp_tool_reference"`
from line 1358
13581358
13591359 - `BetaToolChangeMCPToolReference object`
13601360
1361 Reference to a single MCP tool by its server and remote name — the
1361 Reference to a single MCP tool by its server and remote name; the
13621362 same `server_name`/`name` pair `mcp_tool_use` carries.
13631363
13641364 - `BetaToolChangeMCPToolsetReference object`
No line in this hunk matches that.