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Sweep 10 Nov 2026 · 02:18Z Build v2.1.322 539 read Stable v2.1.311 Latest v2.1.322 Next v2.1.322 Feeds RSS JSON llms.txt llms-full.txt Unofficial
HomeDocsClaude Developer Platform 18 Sep 2026
One change · api

Messages changedapi/beta/messages

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+13added
Lines−13removed
From line 1,318 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

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This page is larger than the 256 KiB this site keeps, so one side of the diff below stops where the stored text does.

from line 1318
13181318 
13191319 - `BetaToolChangeMCPToolReference object`
13201320 
1321 Reference to a single MCP tool by its server and remote name — the
1321 Reference to a single MCP tool by its server and remote name; the
13221322 same `server_name`/`name` pair `mcp_tool_use` carries.
13231323 
13241324 - `type: "mcp_tool_reference"`
from line 1360
13601360 
13611361 - `BetaToolChangeMCPToolReference object`
13621362 
1363 Reference to a single MCP tool by its server and remote name — the
1363 Reference to a single MCP tool by its server and remote name; the
13641364 same `server_name`/`name` pair `mcp_tool_use` carries.
13651365 
13661366 - `BetaToolChangeMCPToolsetReference object`
from line 7591
75917591 
75927592 - `BetaToolChangeMCPToolReference object`
75937593 
7594 Reference to a single MCP tool by its server and remote name — the
7594 Reference to a single MCP tool by its server and remote name; the
75957595 same `server_name`/`name` pair `mcp_tool_use` carries.
75967596 
75977597 - `type: "mcp_tool_reference"`
from line 7633
76337633 
76347634 - `BetaToolChangeMCPToolReference object`
76357635 
7636 Reference to a single MCP tool by its server and remote name — the
7636 Reference to a single MCP tool by its server and remote name; the
76377637 same `server_name`/`name` pair `mcp_tool_use` carries.
76387638 
76397639 - `BetaToolChangeMCPToolsetReference object`
from line 8335
83358335 
83368336 - `defer_loading: optional boolean`
83378337 
8338 If true, tool will not be included in initial system prompt. Only loaded when returned via too
8338 If true, tool will not be included in initial system prompt. Only loaded when returned via tool_reference
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