Source Intelligence
Follow Discord
Sweep 28 Aug 2026 ยท 00:00Z Build v2.1.250 478 read Stable v2.1.236 Latest v2.1.250 Next v2.1.250 Feeds RSS JSON llms.txt

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.

One change

web-search-tool

agents-and-tools/tool-use/web-search-tool

first seen The page's own history The capture it came from

Nearest release: v2.1.247, published 2 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.

agents-and-tools/tool-use/web-search-tool Changed · +1 / -1 lines

from line 63
 To call web search directly, without dynamic filtering, set `allowed_callers: ["direct"]`. Models that don't support programmatic tool calling require this setting. Without it, the API returns a 400 error that tells you to set it.
 
 <Note>
-  The web search tool (with and without dynamic filtering) is available on the Claude API, [Claude Platform on AWS](https://platform.claude.com/docs/en/build-with-claude/claude-platform-on-aws), and [Microsoft Foundry](https://platform.claude.com/docs/en/build-with-claude/claude-in-microsoft-foundry). On Microsoft Foundry, web search requires a [Hosted on Anthropic deployment](https://platform.claude.com/docs/en/build-with-claude/claude-in-microsoft-foundry#additional-features-not-supported-when-hosted-on-azure). On Google Cloud, only the basic web search tool (without dynamic filtering) is available. Web search is not available on Amazon Bedrock.
+  The web search tool (with and without dynamic filtering) is available on the Claude API, [Claude Platform on AWS](https://platform.claude.com/docs/en/build-with-claude/claude-platform-on-aws), and [Microsoft Foundry](https://platform.claude.com/docs/en/build-with-claude/claude-in-microsoft-foundry). On Microsoft Foundry, deployments [hosted on Azure](https://platform.claude.com/docs/en/build-with-claude/claude-in-microsoft-foundry#additional-features-not-supported-when-hosted-on-azure) support only the basic web search tool (`web_search_20250305`, without dynamic filtering). Deployments hosted on Anthropic support all versions. On Google Cloud, only the basic web search tool (without dynamic filtering) is available. Web search is not available on Amazon Bedrock.
 </Note>
 
 The following examples use `web_search_20260318`: