Server has 9 tools with basic descriptions and schemas, but significant gaps limit production readiness. All tools have descriptions (10-100 chars, mostly adequate), and most have input schemas with type definitions. However, parameter descriptions are sparse or missing entirely, most parameters lack explanatory text beyond the name. Output schemas are not documented. Error handling exists but lacks recovery guidance. No tool annotations (readOnlyHint, destructiveHint, idempotentHint) despite clear risk profiles. Naming is verb-forward and clear, but parameter naming could be more explicit (e.g., 'collects_id' vs 'collection_id'). No batch operations or pagination helpers for list tools. Overall, definitions are functional but fall short of LLM-optimized quality.

• Add parameter descriptions to all tools. For 'cursor', specify: 'Pagination cursor from previous response; omit for first page.' For 'limit', specify: 'Max videos to return (1-100, default 20).' For 'collects_id', specify: 'Collection folder ID from list_collects response.'
• Document output schemas formally. Define return types for each tool: e.g., list_collection_videos returns {videos: [{aweme_id, title, ...}], cursor: string|null, has_more: bool}. Include field descriptions.
• Add tool annotations to schema. Mark douyin_logout with destructiveHint=true, douyin_login_start with idempotentHint=false (side effect: opens browser), and all read-only tools with readOnlyHint=true.
• Enhance error responses with recovery guidance. When LoginRequiredError is caught, return {ok: false, error: 'login_required', message: 'Douyin login required. Call douyin_login_start first.'}
• Clarify pagination semantics. Document that cursor is opaque, returned by the API, and should be passed verbatim to the next call. Specify that omitting cursor fetches the first page.