Server has 9 tools with complete input schemas and descriptions, but quality is uneven. All tools are READ_ONLY and well-named with action verbs (get_, search_, scrape_, crawl_, analyze_). Descriptions are present (avg ~120 chars) but lack depth on WHEN to use each tool vs. alternatives. Parameters have types and descriptions, but many lack constraints (enums, ranges, format hints). Output schemas are not documented, LLMs cannot predict response structure. Error handling is absent from visible code; tools simply return JSON.stringify() with no guidance on failures. No tool annotations (readOnlyHint, etc.) despite all being read-only. Missing pagination guidance for list-returning tools (search_youtube, get_youtube_playlist, crawl_site). Composition is reasonable, tools are single-purpose and chainable (e.g., search_youtube → get_youtube_channel).

• Document output schemas for all tools. Example for get_transcript: 'Returns {text: string, timestamps?: Array<{time: string, text: string}>, language: string}'. This enables LLMs to extract fields and chain tools.
• Add error handling with recovery hints. Wrap fetch() calls in try-catch; return structured errors like '{error: "Invalid URL", suggestion: "Check that the URL is a valid YouTube/TikTok link"}' instead of raw API errors.
• Add pagination guidance to search_youtube, get_youtube_playlist, crawl_site. Document that 'limit' caps results; if more exist, suggest calling again with offset or cursor. Return 'total_count' or 'has_more' flag.
• Add parameter constraints: 'lang' should document ISO 639-1 format; 'limit' should specify range (e.g., 1-50); 'maxPages' in crawl_site should specify range. Use descriptions, not just enums.
• Add readOnlyHint to all tool schemas. In src/tools/index.ts, extend ToolDefinition to include 'readOnly?: boolean' and set it true for all 9 tools. This signals to agents that these are safe to call without confirmation.