16 tools with mostly complete schemas and descriptions, but significant gaps in parameter documentation and error handling guidance. Tool names follow verb_noun convention well (save_video, find_videos, loop_section). Descriptions average ~120 chars, within acceptable range but often lack context on when to use vs. similar tools. Input schemas present for all tools with type info, but many parameters lack descriptions or constraints. Output schemas not documented. Error recovery guidance absent. No tool annotations (readOnlyHint/destructiveHint). Composition is sound, tools are single-purpose and chainable.

• Document output schemas for all tools. E.g., find_videos should specify: returns {videos: [{id, title, url, savedAt}], total: number}. This enables LLMs to chain calls and extract IDs for downstream operations.
• Add tool annotations to schema. Mark read-only tools with readOnlyHint=true (find_videos, list_timestamps, get_state). Mark destructive tools with destructiveHint=true (delete_timestamp). Mark idempotent tools with idempotentHint=true (save_video, metronome_start).
• Enhance parameter descriptions with format constraints. E.g., set_speed: 'Playback rate 0.25 - 2.0 (e.g., 0.75, 1.0x, 2x). Accepts decimal or string with optional x suffix.' set_volume: 'Absolute 0 - 100 or relative change (+10, -10). Absolute values override; relative values adjust current level.'
• Add error recovery guidance to tool descriptions. E.g., open_video: 'If multiple matches found, returns {candidates: [{title, url}]}. Retry with more specific title or full URL.' delete_timestamp: 'Returns error if label not found. Call list_timestamps first to verify label exists.'
• Implement confirmation pattern for delete_timestamp. Add optional dry_run parameter (default false) that returns what would be deleted without executing. Or add a separate confirm_delete tool that requires explicit confirmation ID from a prior delete attempt.