Server provides 6 well-structured tools with complete input schemas using Zod validation and clear descriptions in Japanese. All tools are read-only API wrappers with proper naming (verb_noun pattern). However, output schemas are not documented, responses are returned as JSON text without formal schema declarations. Parameter descriptions are present but minimal (10-30 chars), lacking guidance on format constraints, ranges, or when to use each tool. Error handling is basic (EGovApiError, EGovTimeoutError) but lacks recovery guidance for LLMs. No tool annotations (readOnlyHint, etc.) despite all being read-only. Composition is sound, tools chain naturally (search → get_law_data → download_law_file).

• Add formal output schema documentation to each tool. Document the structure of returned JSON (e.g., search_laws returns {laws: [{id, title, type, asof}], total_count, next_offset}).
• Expand parameter descriptions to 50-100 chars. Include format constraints, valid ranges, and defaults. E.g., 'asof: Date in YYYY-MM-DD format (default: today). Must not be in future.'
• Add readOnlyHint: true to all tool definitions via server.registerTool() to signal these are safe, idempotent reads.
• Enhance error messages with recovery guidance. E.g., 'Law not found (404). Try search_laws() with a partial title or different law_type.'
• Document pagination behavior in search_laws and search_keyword descriptions. State default limit, max results, and when to use offset for large result sets.