The server defines 17 tools with properly structured schemas using schemars. All tools have names following verb_noun conventions (post_tweet, get_home_timeline, etc.). Descriptions are present for all tools (ranging 35-150 characters), which meets the 10-1024 character guideline. Input parameters are properly typed with JSON Schema and include descriptions. However, there are notable gaps: (1) Output schemas are not documented, we can see input params in src/params.rs but no corresponding response types or documentation of what each tool returns; (2) No error handling guidance in descriptions, tools don't explain what to do if a tweet is deleted, a user is not found, or a media upload fails; (3) Parameter descriptions lack actionable constraints, e.g., 'max 280 characters' is stated for text but not validated or constrained in schema; (4) Some tools accept ambiguous natural-language input (tweet_id accepting both '123456' AND 'https://x.com/user/status/123456') but no parsing logic or error guidance is visible; (5) No documentation of mutual exclusivity (media vs media_ids in post_tweet) in descriptions themselves, only as text notes. The tool set composition is strong, each tool does one thing, names are clear and distinct, and verb prefixes (post, get, search, like, reply, delete, follow) are appropriate. Authentication is handled server-side via config file (good security practice).

• Document output schemas for all 17 tools. Add a 'Returns' section to each tool description specifying the response structure, field types, and how to extract IDs for chaining (e.g., post_tweet returns tweet_id, which can be passed to reply_to_tweet). Reference src/api.rs or create a new schema doc module.
• Add error handling guidance to tool descriptions. E.g., 'If the tweet is deleted, get_tweet will return a 404. Call search_tweets() to find similar tweets instead.' For each tool that can fail, provide one concrete recovery step.
• Enforce parameter constraints in JSON Schema using minimum, maximum, and pattern fields. Update src/params.rs to include: PostTweetParams { text: {minLength: 1, maxLength: 280}, media: {maxItems: 4}, ...}. This moves validation from description text to machine-readable schema.
• Document mutually exclusive parameters formally. In post_tweet and reply_to_tweet, add a validation rule in the description and (if using schemars conditional schema) declare the exclusivity in the JSON Schema. Example: 'Either media OR media_ids, not both.'
• Add a confirm_delete_tweet tool or require the LLM to call get_tweet first. Include a warning in delete_tweet description: 'This is irreversible. Call get_tweet(tweet_id) first to confirm the content.'
• Expand tool descriptions to 100-150 characters. Include a brief WHEN clause. E.g., 'Like a tweet to show approval. Use this instead of retweet if you want to amplify without adding commentary. Requires the tweet to exist.' This helps LLMs pick the right tool when many are available.