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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 v2.1.64

Search Hints in Tool List [Gradual Rollout]

What

Tool names in the deferred tool list can display alongside a short description hint (e.g., "Read — read files, images, PDFs, notebooks"), making it easier to identify the right tool.

Status

Feature-flagged behind tengu_tst_hint_m7r and overridable via CLAUDE_CODE_SEARCH_HINTS_IN_LIST env var.

Details
  • Every built-in tool now has a searchHint property with a short plain-English description
  • When enabled, the tool list displays "ToolName — description" format
  • Hints include descriptions like "execute shell commands", "search file contents with regex (ripgrep)", "delegate work to a subagent"
  • Environment variable takes precedence over feature flag (set to 1 to enable, 0 to disable)
Evidence

Search hints (gated by tengu_tst_hint_m7r, search for "searchHint", "CLAUDE_CODE_SEARCH_HINTS_IN_LIST")

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

See this entry in the whole of v2.1.64 →