Reddit MCP server has well-structured tool definitions with complete schemas and descriptions. All 5 tools follow verb_noun naming (search_reddit, get_subreddit_posts, get_post_comments, get_user_profile, get_trending). Schemas use Zod with proper type constraints (enums, min/max bounds). Descriptions are present and actionable (avg ~120 chars). However, output schemas are not formally documented, responses are formatted as text blobs rather than structured objects. Error handling is minimal (no recovery guidance). No tool annotations (readOnlyHint, idempotentHint). Parameter descriptions are adequate but lack dependency hints (e.g., 'post_id accepts t3_abc123 or abc123 format'). Missing: pagination guidance, per-item error reporting for batch operations.

• Document output schemas formally. Instead of returning formatted text, return structured JSON: {posts: [{id, title, author, score, url, created_at}], total_count, next_cursor}. This enables field extraction and tool chaining.
• Add tool annotations to all tools. Use readOnlyHint: true for all 5 tools to signal safety. This lets agents reason about retry safety and parallel execution.
• Implement error handling with recovery guidance. Wrap reddit.get() calls in try-catch. Return {error: 'User not found', suggestion: 'Try search_reddit() with a partial username'} instead of stack traces.
• Enhance get_trending description. Clarify: 'Get trending/popular posts from r/popular (Reddit's front page). Returns top posts across all subreddits sorted by current popularity.'
• Add pagination support. Return {posts: [...], total_count: 1523, next_cursor: 'abc123'} and accept cursor parameter in search_reddit and get_subreddit_posts. Document in descriptions: 'Use next_cursor to fetch additional results.'