Under the hoodTier: how much it should matter to you
1Useful: my rating, 1 to 5
1Signal: worth watching, 1 to 5
TelemetryArea: what it touches
Internal ChangesKind: in v2.1.321,
Internal ChangesSection of the release
What
Claude Code sends usage data, called telemetry, back to Anthropic. That data can now include an optional field, tool_pool_build_count. It counts how many times a session built its main list of tools, which is the set of actions Claude Code can take. It is sent together with the measure of processor time spent on each turn.
Why
This helps measure how much it costs when Claude Code rebuilds its tool list during a session.
