{"version":"2.1.323","anchor":"new-tool-pool-telemetry-fields","canonical_anchor":"new-tool-pool-telemetry-fields","heading":"Usage data now records when the saved tool list expires","tier":"internal","area":"Telemetry","scope":"individual","heads_up":false,"url":"https:\/\/changelogs.core-directive.com\/v\/2.1.323\/e\/new-tool-pool-telemetry-fields","release_url":"https:\/\/changelogs.core-directive.com\/v\/2.1.323","markdown":"### Usage data now records when the saved tool list expires\n\nClaude Code's internal turn measurements now track how often its saved list of tools is rebuilt only because it got too old\n\n**What**\n\nClaude Code keeps a saved copy of the list of tools available to the model. Its internal per-turn measurements now record how often that list is rebuilt only because it reached an age limit, along with what that limit is.\n\n**Why**\n\nThe saved tool list now has an age limit, so it is periodically rebuilt rather than reused indefinitely. Nothing changes in what you do.\n\n- Area: Telemetry\n- Tier: Under the hood\n- Useful: 1\/5\n- Signal: 1\/5\n- Scope: individual\n- Heads-up: no"}