This server presents a clear, single-purpose design with 6 tools that follow consistent naming conventions (verb_noun pattern). All tools have explicit definitions visible in src/index.ts with descriptions and input schemas. However, several quality gaps prevent a higher score: (1) Parameter descriptions are minimal or absent for many inputs (tag, featured_only, platform, limit, category, current_only lack substantive guidance); (2) No output schemas are documented, agents cannot infer what fields will be returned or plan downstream calls; (3) Error handling is minimal, no recovery guidance or categorization; (4) No tool annotations (readOnlyHint/destructiveHint/idempotentHint) despite clear distinction between read-only and write operations; (5) The 'leave_message' tool lacks critical security documentation about rate limits, validation, or what constitutes valid input. The tool set is well-scoped and the HTTP transport is current, but definition quality falls into the C range due to missing output schemas and sparse parameter documentation.

• Add output schemas to each tool. Example for get_profile: {type: 'object', properties: {name: {type: 'string'}, tagline: {type: 'string'}, links: {type: 'array', items: {type: 'object', properties: {title, url}}}, contact: {type: 'object'}}, required: [...]}. Agents need to know the response structure.
• Expand parameter descriptions with constraints and examples. For 'tag' in get_projects: 'Filter projects by tag (case-insensitive). Valid tags: javascript, typescript, design, infrastructure. Pass empty or omit to return all.' For 'limit' in get_writing: 'Maximum number of posts to return (1 - 100, default 20).'
• Add tool annotations. Mark get_profile, get_projects, get_writing, get_experience, get_skills with readOnlyHint: true. Mark leave_message with destructiveHint: true (modifies guestbook state) and include an idempotentHint or confirmation warning.
• Document error responses for leave_message. Specify what triggers a failure: 'Invalid name: must be 1 - 100 characters', 'Invalid message: must be 10 - 5000 characters', 'Rate limited: max 5 messages per hour per IP', 'Access denied: verify agent token validity'. Each error should guide recovery.
• Add recovery guidance to gated tool descriptions. For get_experience and get_skills: 'Access requires guestbook entry or valid Agent Token. If denied, call leave_message first to gain access.' This chains tools for agents.
• Cap numeric parameters. For 'limit' in get_writing, enforce max=100 in the schema and return only top 20 by default. Add description: 'Maximum posts to return. Capped at 100 to avoid context overflow.'