You'll noticeTier: how much it should matter to you
2Useful: my rating, 1 to 5
3Signal: worth watching, 1 to 5
Cloud BrowserArea: what it touches
ImprovementsKind: in v2.1.310,
ImprovementsSection of the release
What
The cloud browser is a web browser that runs in the cloud. It reaches Claude Code through an MCP server named remote-browser, an outside program that gives Claude Code extra tools. Calls to it must now go through its permission check.
A new guard on MCP tools/call requests rejects a call to the cloud browser tool when refusesRemoteBrowserCallOutsideChecks finds it is outside its permission check. The error is REMOTE_BROWSER_OUTSIDE_CHECKS_REFUSED, with the message "cloud browser called outside its permission check". Before, such a request went straight through.
A new refusal message explains the rule: "Tools of MCP server 'remote-browser' (the cloud browser) can only be called by the model in this session, where each call gets auto mode's safety check or a person's approval; this call would skip both."
Why
Every cloud browser action now gets either auto mode's safety check or your approval. Anything that tries to call the cloud browser another way is refused with one of these messages.
