The server has three READ_ONLY tools with visible input schemas and functional descriptions, but significant quality gaps limit its production readiness. Tool names are action-verb based (get_*, which is good), but descriptions are thin and lack actionable context. Parameter descriptions are minimal, naming conventions are inconsistent ('hours_ago' vs 'limit' inconsistency with no explicit bounds), and output schemas are NOT documented. Error handling is present in the code but not exposed in tool definitions. The server lacks parameter constraints (no min/max for hours_ago, no enum for limit), and descriptions do not indicate when to call which tool or what the agent should expect downstream. For a YouTube-specific utility, the tools are narrowly scoped (appropriate), but schema quality and description depth fall short of production baselines.

• Add min/max constraints to numeric parameters: hours_ago (suggest 1 - 720), limit (suggest 1 - 100 max). Document these in parameter descriptions and ideally as JSON Schema constraints (minimum, maximum).
• Document output schemas for all three tools. Explicitly state that get_latest_youtube_videos returns { total_videos: int, hours_checked: int, videos: [ { video_id, title, published_at, url, channel_title, ... } ] }. Include field types and what downstream tools can extract.
• Expand get_subscribed_channels description to: 'Get a list of all YouTube channels you are subscribed to. Call this first to discover available channels before using get_channel_videos. Returns channel_id, channel_title, and description for each subscription.' (currently 12 words → 45 words).
• Add error recovery hints: 'If authentication fails, ensure credentials.json is downloaded from Google Cloud Console and token.json is in the server directory.' Add to tool descriptions or a shared preamble.
• Enrich parameter descriptions with concrete bounds: 'hours_ago: Number of hours to look back for new videos (integer, 1 - 720, default: 24)' instead of just 'default: 24'.
• Document tool chaining order in descriptions: 'Typically call get_subscribed_channels first to list available channels. To fetch videos from a specific channel, use get_channel_videos with the channel_id from the subscription list.'
• Consider adding pagination guidance to output descriptions if result sets grow large (e.g. 'Limited to most recent 50 videos per channel; call multiple times with different hours_ago values to retrieve older content').