You'll noticeTier: how much it should matter to you
2Useful: my rating, 1 to 5
2Signal: worth watching, 1 to 5
MCPArea: what it touches
ImprovementsKind: in v2.1.267,
What probably matters to youSection of the release
What
Claude Code forwards its MCP (Model Context Protocol) tools to worker processes using an internal "passthrough" list. That list's limit was raised from 256 entries to 1024, so setups with a very large number of MCP tools no longer hit the old cap. Each entry in the list can also now carry optional annotations and hints fields.
Why
Users connecting many MCP servers with lots of tools were previously capped at 256 forwarded tools; the higher limit removes that ceiling for larger tool setups.
