Server has 2 tools with critical definition gaps. addTwoNumbers lacks any business purpose in a Twitter agent context. createPost has a description but parameters lack descriptions entirely (null values visible in schema). No parameter descriptions means LLMs cannot understand what 'status' expects. Input schemas are present but parameter-level documentation is completely absent. No output schemas documented. Error handling exists but is minimal (generic error messages). No tool annotations (readOnlyHint/destructiveHint). Naming is acceptable but descriptions are too brief (10-20 chars) and parameters are undocumented.

• Add non-empty descriptions to all parameters. For 'status' in createPost: 'The tweet text to post (max 280 characters, required)'. For 'a' and 'b' in addTwoNumbers: 'First number to add' and 'Second number to add'.
• Document output schemas for both tools. Example for createPost: 'Returns {success: boolean, tweet_id: string, text: string, created_at: ISO8601}'. This enables downstream tool chaining.
• Remove addTwoNumbers entirely or replace with Twitter-relevant tools (e.g., search_tweets, get_user_profile, like_tweet). A math utility has no place in a Twitter agent.
• Add tool annotations: mark createPost with destructiveHint=true so LLMs know this modifies state and should be treated carefully.
• Enhance error messages with recovery guidance. Instead of 'Twitter Error: {message}', return structured errors like '{error: 'rate_limit_exceeded', retry_after_seconds: 900, guidance: 'Wait 15 minutes before retrying'}' for retryable errors, and '{error: 'invalid_credentials', guidance: 'Check TWITTER_API_KEY and TWITTER_API_SECRET environment variables'}' for configuration errors.