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Sweep 28 Aug 2026 · 00:00Z Build v2.1.250 478 read Stable v2.1.236 Latest v2.1.250 Next v2.1.251 Feeds RSS JSON llms.txt
Reading a new release v2.1.251 Analysing changes · 2/5 Deeper second pass · 4/5 agents 427 findings $12.75 so far

DisclaimerUnofficial, and not affiliated with Anthropic. Nearly all of this is read straight out of what ships: npm bundles, captured prompts, published docs. Anthropic's own notes go in verbatim, marked as theirs. The rest is my reading, and every entry carries the strings behind it. If one looks wrong, vote it down and say why.

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8 pages for enable_tool_search.

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Scale to many tools with tool search Claude Code CLI · in the page agent-sdk/tool-search …ion and loads tool definitions upfront for that deployment instead. [`ENABLE_TOOL_SEARCH`](#configure-tool-search) can't override this, since the rejection comes from the deployment itself. </Note> #… Explore the context window Claude Code CLI · in the page context-window …specific ones on demand via tool search when a task needs them. Set `ENABLE_TOOL_SEARCH=auto` to load schemas upfront when they fit within 10% of the context window, or `ENABLE_TOOL_SEARCH=false` to… Environment variables Claude Code CLI · in the page env-vars …/docs/en/mcp#scale-with-mcp-tool-search) is disabled by default. Set `ENABLE_TOOL_SEARCH=true` if your proxy forwards `tool_reference` blocks. As of v2.1.196, [Remote Control](/docs/en/remote-control#… Claude Code on Google Cloud's Agent Platform Claude Code CLI · in the page google-vertex-ai …ent Platform serving stacks reject the required beta header. Setting `ENABLE_TOOL_SEARCH=true` doesn't override this. Set `ENABLE_TOOL_SEARCH=false` to disable tool search on every model. Before v2.1… Connect Claude Code to tools via MCP Claude Code CLI · in the page mcp …gurations without tool search include a custom `ANTHROPIC_BASE_URL`, `ENABLE_TOOL_SEARCH=false`, and a model earlier than the Claude 4.5 generation on Google Cloud's Agent Platform. * **On a Microsoft… Customize sessions in self-hosted environments Claude Code CLI · in the page self-hosted-environments-configuration …settings schema. Sessions inherit the runner's environment, so set [`ENABLE_TOOL_SEARCH`](/docs/en/mcp#scale-with-mcp-tool-search) there to control MCP tool search for every session a runner spawns;… Configuration reference Claude Documentation · in the page third-party/claude-desktop/configuration …level Claude Code managed settings that set that kill switch or turn `ENABLE_TOOL_SEARCH` off, those win; set `ENABLE_TOOL_SEARCH` to `force` there instead (with `parentSettingsBehavior: "merge"` so t… Deploy Claude Desktop on 3P with an LLM gateway Claude Documentation · in the page third-party/claude-desktop/gateway …ields those features add. This suppression takes precedence over the `ENABLE_TOOL_SEARCH` environment variable, so setting that variable has no effect on Claude Desktop sessions. The variable applies…