Reddit MCP server has 16 tools with generally clear naming and mostly complete input schemas. Tool names follow verb_noun convention well (browse_subreddit, get_post, create_post, delete_comment). Descriptions are present for all tools and average ~120 chars, within the 10-1024 char baseline. Input schemas are visible and typed with Zod validation. However, there are critical gaps: (1) Output schemas are not documented anywhere in the visible code, the tool definitions show inputs but no return type descriptions, forcing LLMs to infer result structure; (2) Error handling lacks recovery guidance, no tool describes what to do if a call fails (e.g., 'Try search_reddit if post not found'); (3) Some parameter descriptions are generic and lack constraints (e.g., 'post_id' and 'comment_id' lack format guidance); (4) Destructive operations (delete_post, delete_comment) lack confirmation/dry-run support despite being irreversible. READ_ONLY tools dominate (10 of 16), but WRITE/DESTRUCTIVE tools lack safety patterns. Pagination is supported via 'after' cursors but no total count is documented. The server uses fastmcp framework which registers tools with descriptions, but return type documentation is missing from all 16 tool definitions.

• Document output schemas for all 16 tools. Specify the structure of returned objects, field types, and which fields are always present vs. optional. Example: 'Returns PostInfo with fields: title (string), author (string), score (number), comments (number), created_at (ISO8601 timestamp), permalink (string), content (string).'
• Add error recovery guidance to tool descriptions and parameter docs. For each tool, document: What errors can occur? (e.g., 'User not found if username does not exist', 'Rate limited if >60 requests/min') What should the LLM do? (e.g., 'Try search_users() with partial match', 'Wait 60 seconds and retry'). Implement error responses following the pattern: '{"error": "<category>", "message": "<human description>", "recovery": "<actionable next step>"}' where category is one of: not_found, rate_limited, authentication_failed, permission_denied, invalid_input, internal_error.
• Implement confirmation or dry-run for delete_post and delete_comment. Add an optional 'confirm' parameter (boolean, default false) or a separate 'preview_delete' tool that returns what would be deleted without executing. Pattern: call preview first, then call delete with a confirmation token returned by preview.
• Add explicit constraints to ID parameters. Update descriptions: 'post_id (string, Reddit base-36 ID, max 10 chars, e.g. "a1b2c3")' and 'comment_id (string, Reddit base-36 ID, max 10 chars, e.g. "x9y8z7")'. For numeric params like limit, add range: 'limit (integer, 1 - 100, default 25)'.
• Include total count or exhaustion signal in paginated responses. When 'after' is returned, also return 'has_more' (boolean) or 'total_count' (integer). Update tool description: 'Returns paginated results with after cursor for next page. has_more=false indicates no more results.'