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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 v2.1.242

Each per-app tool now needs a specific permission tier

Not switched on
Useful2 Signal3
Computer Use

Per-app tools each require a permission tier, so a low grant lets Claude look but not act.

Tier mapping for per-app tools exists inside the host-gated computer-use feature.

What

The existing read, click and full permission tiers are mapped onto the individual per-app tools, so a low-tier grant permits looking but not acting. Calls below the required tier come back as tier_insufficient with guidance to request a higher tier.

Details
  • Read tier: app_list_windows, app_screenshot, app_ax_find, app_batch, app_bring_to_current_space.
  • Click tier: app_click, app_scroll.
  • Full tier: app_drag, app_type, app_key, app_menu.
  • app_menu additionally refuses Services submenu items and Apple-menu system actions; app_key refuses key combinations that would touch the system clipboard.
Evidence

tier_insufficient

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 v2.1.242 →