What
The built-in tool that lets Claude work on a computer, shown as "Your computer", now carries guidance for Claude about when to use it. When a task needs the user's own computer, Claude is told not to use this tool and to use a matching MCP tool instead. An MCP tool is one supplied by an MCP server, an add-on that connects Claude Code to outside programs.
A few smaller internal additions arrived at the same time:
- Several built-in tools now carry an identifier for a tool registry.
- Claude Code now keeps track of which tool uses relate to cloud memory.
- A data-flow server field was added to one of Claude Code's internal data formats.
Why
Most of this is groundwork for a tool registry and for tracking how data moves between tools. The guidance on the computer tool is the part that can change which tool Claude picks.