You'll noticeTier: how much it should matter to you
2Useful: my rating, 1 to 5
2Signal: worth watching, 1 to 5
SubagentsArea: what it touches
ImprovementsKind: in v2.1.267,
ImprovementsSection of the release
What
When Claude Code figures out which tools a spawned subagent is allowed to use, it now also includes machine-level MCP (Model Context Protocol, a standard for connecting external tools) tools, in addition to the app-state MCP tools and the tools an agent explicitly declares. This applies both to subagent spawning generally and to the workflow SDK's agent tool-set resolution, and the machine-level tool list is now merged in when building skill tool sets as well.
Why
This broadens what tools a subagent can reach, so machine-wide MCP tool configurations are no longer left out when a subagent's tool set is computed.
