Under the hood
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No-op stub tools tell the model Chrome browser tools need no separate enabling step.
Two new no-op stub tools, enable__mcp__claude-in-chrome and a generic 'Browser' variant, do nothing when called. They exist to tell the model that if tools named with Claude_Browser are already present in the session, they're already usable, so the model should use those directly instead of wasting a call trying to "enable" them.
Names in the bundleenable__mcp__claude-in-chrome