Strong foundation with 16 well-named, read-only tools covering X API v2 comprehensively. All tools have descriptions (avg ~80 chars, within baseline 34-392 range) and explicit input schemas with types. Naming follows verb_noun pattern consistently (search_x, get_post_counts, get_user, etc.). However, several parameter descriptions lack actionable constraints (e.g., query params don't specify operator syntax limits, max_results ranges stated but not enforced in schema). Output schemas are partially documented in code but not formally declared in tool definitions. Error handling is minimal, no recovery guidance or categorization. Security is solid (read-only, no secrets exposed), but composition could be tighter (e.g., get_thread + get_replies overlap; no batch variants for common loops).

• Add formal output schema declarations to all tools. Document the structure of 'tweets', 'users', 'news', 'meta' objects with field types and descriptions. Example: 'Returns {tweets: [{id, text, author, metrics, urls, hashtags}], meta: {result_count, newest_id}}'.
• Enhance parameter descriptions with explicit constraints. For 'query' params, add: 'Supports X API v2 operators: from:username, to:username, @mention, has:media, lang:en, etc. Max 512 characters. Use quotes for exact phrases and parentheses for grouping.'
• Implement error categorization and recovery guidance. Catch httpx.HTTPStatusError and return structured errors: {error: 'User not found', code: 404, recovery: 'Try search_users() with a partial name or check the username spelling.'}
• Clarify tool boundaries. Document when to use get_thread vs get_replies (thread = full conversation tree; replies = direct replies only). Add a 'See also' section to each tool linking related tools.
• Add batch variants for high-frequency tools. Introduce get_user_tweets_batch(usernames: [str], max_results: int) to fetch timelines for multiple users in one call, reducing latency and token overhead.