{"version":"2.1.268","anchor":"mcp-tool-schema-meta-validator-now-loaded-lazily-via-dynamic","canonical_anchor":"mcp-tool-schema-meta-validator-now-loaded-lazily-via-dynamic","heading":"MCP tool-schema meta-validator now loaded lazily via dynamic chunk import","tier":"internal","area":"MCP","scope":null,"heads_up":null,"url":"https:\/\/changelogs.core-directive.com\/v\/2.1.268\/e\/mcp-tool-schema-meta-validator-now-loaded-lazily-via-dynamic","release_url":"https:\/\/changelogs.core-directive.com\/v\/2.1.268","markdown":"### MCP tool-schema meta-validator now loaded lazily via dynamic chunk import\n\nMCP's tool-schema validator is now loaded lazily from a separate bundled chunk instead of built upfront\n\n**Unclear.** Whether this lazy-loading change has any user-visible effect beyond internal structure is not stated.\n\n**What**\n\nWhen Claude Code checks that an MCP (Model Context Protocol) server's tool definitions conform to the JSON Schema draft 2020-12 standard, it now loads the validator function lazily from a separate bundled chunk of code, rather than constructing the validator instance directly every time.\n\n**Why**\n\nThis is an internal implementation change to how the validator is obtained; if that validator ever fails to load, tool schema checks fail open (meaning they don't block the tool from being used), so the practical behavior for users should stay the same.\n\n- Area: MCP\n- Tier: Under the hood\n- Useful: 1\/5\n- Signal: 1\/5"}