{"version":"2.1.293","anchor":"skill-and-tool-filtering-changed-for-deferred-or-replaced-na","canonical_anchor":"skill-and-tool-filtering-changed-for-deferred-or-replaced-na","heading":"Changed rules for which tools and skills are left out","tier":"internal","area":"Tools","scope":"individual","heads_up":false,"url":"https:\/\/changelogs.core-directive.com\/v\/2.1.293\/e\/skill-and-tool-filtering-changed-for-deferred-or-replaced-na","release_url":"https:\/\/changelogs.core-directive.com\/v\/2.1.293","markdown":"### Changed rules for which tools and skills are left out\n\nThe rules for dropping tools from what Claude is offered now also check aliases, and Claude Code tracks skills that were replaced\n\n**Unclear.** It is not clear which extra conditions now cause a tool to be dropped.\n\n**What**\n\nClaude Code filters the list of tools offered to Claude. Before, it dropped a tool only if the tool's name was in a set of names to exclude. Now it drops a tool when its name matches in another way too, or when its name or alias (an alternative name for the same tool) passes certain further checks.\n\nSeparately, Claude Code now keeps a record of skills (reusable instructions Claude can load) that have been replaced, in the order they were replaced.\n\n**Why**\n\nThis can change which tools and skills Claude is offered.\n\n- Area: Tools\n- Tier: Under the hood\n- Useful: 2\/5\n- Signal: 2\/5\n- Scope: individual\n- Heads-up: no"}