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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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Claude Code v2.1.172

Chrome Browser Tools: Batch ToolSearch Loading

What

The Chrome browser automation system prompt now explicitly instructs Claude to load all needed tools in a single ToolSearch call using a comma-separated select: query, rather than one call per tool.

Details
  • New guidance: "Do NOT load tools one at a time; each separate ToolSearch call wastes a full round-trip"
  • The recommended starter set covers tabs_context_mcp, navigate, computer, read_page, and tabs_create_mcp in one call
  • Task-specific extras (recording, forms, console debugging) should be added to that same call when the task obviously needs them
Evidence

Updated browser automation prompt (search for "batch every tool you expect to need into ONE ToolSearch call")

Strings lifted out of the shipped bundle, so the claim above can be checked against them.

Related

Other releases about the same thing. Found by shared names or similar wording; neither means one caused the other.

See this entry in the whole of v2.1.172 →