Under the hoodTier: how much it should matter to you
2Useful: my rating, 1 to 5
4Signal: worth watching, 1 to 5
Cloud SessionsArea: what it touches
Internal ChangesKind: in v2.1.281,
What probably matters to youSection of the release
What
A cloud session is a session running on remote machines. When one is created with a deviceBinding, meaning it is tied to a particular device, the request now lists four MCP tools as not allowed. MCP (Model Context Protocol) tools are extra tools supplied by a connected server, and these are named mcp__<server>__ followed by the tool name:
device_bash
device_list_dir
device_stage_files
device_commit_files
Any tools the caller has already blocked through disallowedTools go into the same list, which is sent as disallowed_tools.
Why
In a session bound to a device, Claude cannot call these four device tools. Tools you block yourself stay blocked alongside them.
