VoyageHacks MCP server demonstrates solid tool definition quality with consistent naming patterns, complete input schemas, and clear descriptions across all 12 tools. All tools follow verb_noun naming (search_*, get_*), have documented parameters with type enums for language selection, and descriptions ranging 80-180 chars. However, output schemas are not documented in the source, parameter descriptions lack actionable constraints (e.g., no guidance on what 'context' means for recommend_travel_gear), and error handling is not visible. The affiliate nature is disclosed in descriptions but tool names deliberately omit 'affiliate' to avoid LLM routing bias, a pragmatic choice but worth noting. No tool annotations (readOnlyHint, destructiveHint) are present despite all tools being read-only.

• Document output schemas for all 12 tools. Include field names, types, and descriptions. Example: search_articles should return {results: [{title, url, lang, snippet}], total_count, has_more}.
• Add readOnlyHint annotation to all tools in the tool definition. This signals to agents that these tools are safe to call without side effects.
• Enhance parameter descriptions with actionable constraints. For 'context' in recommend_travel_gear, specify: 'Travel context or use case (e.g., "backpacking in Southeast Asia", "luxury beach vacation", "business trip"). 50-200 characters.'
• Implement and document error handling. Define error categories: 'not_found' (suggest alternatives), 'invalid_language' (list supported langs), 'rate_limited' (retry with backoff), 'service_unavailable' (transient, retry).
• Add pagination support to search_articles and search_travel_gear. Include limit (default 20, max 100), offset, and total_count in responses. Document in tool descriptions.