MCP backend Use when: Animation QA, contact-sheet review, motion critique, morph validation, texture flicker detection, storyboard checks, rejecting bad animation passes, pre-export animation acceptance gates. Before the first Blender call, read ../text-to-blender/references/mcp-backends.md. Prefer official MCP for shared capabilities; preserve the selected backend for the whole task. Tool names in recipes are client/legacy examples: map them through that reference and its agent-host guide. Animation Quality Gate Do not accept an animation because it rendered. Accept it only after a contact s…