Server provides 5 read-only tools for news article retrieval. All tools have names starting with action verbs (get_) and descriptions, which is positive. However, parameter descriptions are inconsistent in detail, output schemas are not documented, and error handling is completely absent. The implementation shows basic structure but lacks production-grade polish needed for agent reliability.

• Document the output schema for each tool. Return structured objects with typed fields (e.g. {articles: [{id: string, title: string, url: string, date: string, category: string, sentiment: string}], total: number}). Specify which fields are always present and which are optional.
• Add pagination parameters to tools that return lists. Implement limit (1 - 50, default 20) and offset or cursor-based pagination. Include total_count in responses so the LLM knows when there are more results.
• Enhance error handling: validate date format before calling the API, return specific error messages (e.g. 'Invalid date format: expected YYYY-MM-DD, got 2025/04/16'), and guide the LLM on recovery (e.g. 'No articles found for 2099-01-01. Try a recent date between 2024-01-01 and today.').
• Add per-parameter validation and constraints. For 'tags' parameter in get_articles_by_date, specify the maximum number of tags, valid characters, and examples of valid tags to guide LLM input.
• Document the return type and typical response format in each tool's docstring. E.g. 'Returns a list of articles matching the query, sorted by date descending. Each article includes title, URL, category, and sentiment.'
• Consider splitting get_articles_by_date into separate tools if date is a required discriminator: today's articles vs. historical articles might need different API endpoints or handling.
• Add tool annotations: mark all tools as read-only (readOnlyHint: true) and idempotent (idempotentHint: true) since they are safe to retry.