What probably matters to youSection of the release
What
An MCP server is an add-on that gives Claude extra tools. The tool Claude Code uses to call them now accepts an optional result_not_for_model flag:
When set, the result comes back as the raw MCP content, with nothing resized, saved or shortened, and the count_tokens size check skipped.
A result longer than 10485760 characters fails instead.
It is honoured only for a host connected over the process's own pipes. Hosts can detect support through mcp_call_result_not_for_model_v1, which is advertised only when the connection neither redacts what it saves nor is remote.
Separately, the information Claude Code builds its prompt from gains an originalCwd field, the folder the session started in. It is left empty when a privacy check is true: when a hipaa restriction applies, when another restriction check is true, or when the check itself fails.
Why
Programs that drive Claude Code can fetch large MCP results for their own use without them being cut down or sent to the model. In privacy-restricted setups the starting folder's path is kept out of the prompt.
