{"name":"tengu_deferred_tools_pool_change","slug":"tengu-deferred-tools-pool-change","family":"flag","title":"Feature flags","noun":"feature flag","description":"Deferred-tool telemetry now tracks resurfaced tools and whether tool search is unavailable","description_source":"entry","described_by":{"version":"2.1.265","anchor":"deferred-tools-pool-telemetry-gains-toolsearchabsentresurfa"},"presence":{"first_seen":null,"removed_in":null,"in_current_build":false,"newest_mined":"2.1.322","builds":0,"mined_builds":161,"first_cited":{"version":"2.1.248","released_at":"2026-08-27 20:35:36","spans":1}},"aliases":[],"entries":[{"version":"2.1.269","anchor":"new-restored-tool-category-tracked-in-deferred-tools-pool","heading":"New 'restored' tool category tracked in deferred-tools-pool diffing","line":"Deferred-tools telemetry adds a 'restored' count for tools that reappear after being hidden","released_at":"2026-09-11 18:12:49","reason":"gate cited by this entry, found in this entry's text"},{"version":"2.1.265","anchor":"deferred-tools-pool-telemetry-gains-toolsearchabsentresurfa","heading":"Deferred-tools-pool telemetry gains toolSearchAbsent\/resurfacedCount fields tied to a new tool-search-absent mode","line":"Deferred-tool telemetry now tracks resurfaced tools and whether tool search is unavailable","released_at":"2026-09-08 19:05:16","reason":"gate cited by this entry, found in this entry's text"}],"entries_total":2,"docs":[],"docs_total":0,"gates":[],"related":[{"name":"tengu_deferred_stub_tool","slug":"tengu-deferred-stub-tool","description":"Default `true`, read once per session and then kept. When on and deferred tool loading is in use, a request's tool list gains a tool named `DeferredToolPlaceholder` with `defer_loading` set, described as `Reserved placeholder that keeps deferred tool loading active; never call this tool.`, unless one is already there. It is never added under HIPAA restrictions, or while `CLAUDE_CODE_DISABLE_EXPERIMENTAL_BETAS` is set and tool search is not forced on."}],"url":"https:\/\/changelogs.core-directive.com\/reference\/flag\/tengu-deferred-tools-pool-change","family_url":"https:\/\/changelogs.core-directive.com\/reference\/flag.json"}