You'll notice
Useful2 Signal2
Plan updates no longer count as a browser tool, but still show the "Plan updated" label.
What's wrong with this entry?
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What
"update_plan" was removed from the list of Claude-in-Chrome tool names used to build the prefixed browser tool ids, so it no longer counts as one of the browser tools. It is still recognised for display, keeping the "Plan updated" label.
Evidence
"update_plan"
Strings lifted out of the shipped bundle, so the claim above can be checked against them.