Twitter MCP has 14 well-named tools with consistent verb_noun patterns (search_tweets, post_tweet, get_user). All tools have descriptions (avg 85 chars, within baseline 34 - 392). Input schemas are present and use Zod validation with type constraints (e.g., maxLength:280 for tweets, min/max for result counts). However, parameter descriptions are sparse, most lack actionable guidance on format, constraints, or dependencies. Output schemas are not documented; responses are stringified text rather than structured objects. Error handling is absent from visible code. No tool annotations (readOnlyHint, destructiveHint) despite clear risk stratification (READ_ONLY, WRITE, DESTRUCTIVE). Composition is sound: tools chain naturally (search → get_tweet → reply_tweet). Naming is clear and unambiguous.

• Convert all tool responses from stringified text to structured JSON objects. Define explicit output schemas for each tool (e.g., search_tweets returns {tweets: [{id, text, author_id, metrics}], users: {...}, nextToken}). Document these schemas in tool descriptions.
• Add tool annotations: mark read-only tools with readOnlyHint=true (get_*, search_*), destructive tools with destructiveHint=true (delete_tweet), and idempotent tools with idempotentHint=true (like_tweet, retweet). This enables agents to reason about retry safety.
• Enhance parameter descriptions with format and constraint guidance. E.g., 'username (string, no @ prefix, 1-15 chars)', 'query (string, supports operators: "phrase", from:user, -exclude, has:links, is:reply, lang:en)', 'max_results (number, 10-100, default 10)'.
• Implement error recovery guidance. When a user lookup fails, return 'User "@invalid" not found. Try search_users(query="invalid") to find similar accounts.' When rate-limited, return 'Rate limit exceeded. Retry after 15 minutes.'
• Add pagination to get_mentions and get_user_tweets. Accept max_results (5-100) and next_token parameters. Return total_count and next_token in responses so agents can iterate through large result sets without context explosion.