{"version":"2.1.225","anchor":"tool-description-cache-key-gained-a-segment","canonical_anchor":"tool-description-cache-key-gained-a-segment","heading":"Tool description cache key gained a segment","tier":"internal","area":"Elsewhere","scope":null,"heads_up":null,"url":"https:\/\/changelogs.core-directive.com\/v\/2.1.225\/e\/tool-description-cache-key-gained-a-segment","release_url":"https:\/\/changelogs.core-directive.com\/v\/2.1.225","markdown":"### Tool description cache key gained a segment\n\nTool descriptions are cached separately depending on which tools are loaded, avoiding stale reuse.\n\n**What**\n\nPrepared tool descriptions are cached under a key that now varies on whether a particular tool is in the tool set.\n\n**Details**\n\n- an \"S:\" prefix segment is added when that tool is present, empty otherwise\n- sessions with and without it no longer share cached descriptions\n\n**Evidence**\n\n`? \"S:\" : \"\"`\n\n- Area: Elsewhere\n- Tier: Under the hood\n- Useful: 2\/5\n- Signal: 0\/5"}