8 tools with consistent naming (verb_noun pattern: search_*, get_law) and detailed descriptions (150-250 chars, well above 10-char minimum). All tools have input schemas with typed parameters and descriptions. However, output schemas are not documented in the visible code, only input schemas are defined. Parameter descriptions are strong (domain-specific, mention use cases), but lack explicit constraints (enums, ranges, format specs). No error handling guidance visible. Tool composition is sound (each does one thing), but no pagination support despite tools returning potentially large result sets (e.g., search_tsuuchi returns 600+ items). Security: no secrets in params (good), but no permission gates or audit trail declarations visible.

• Add formal output schemas to each tool definition. Document response fields (e.g., results: array of {id, title, content, source_url}, total_count, next_cursor). This enables LLMs to extract and chain data correctly.
• Implement pagination: add 'limit' (default 20, max 100) and 'offset' or 'cursor' parameters to search_* tools. Return total_count and next_cursor in responses. Cap results at 50 items per call to prevent context window exhaustion.
• Add error recovery hints to descriptions. E.g., search_tanka: 'If 0 results, try search_youkou with the same keyword as fallback.' search_law: 'If law not found by name, try search_law first.'
• Formalize parameter constraints in JSON Schema: use enum for besshi (1-13), minItems/maxItems for limit, pattern for lawNameOrId (e.g., '^[0-9A-Z]{9}$' for law_id format). Remove constraint text from descriptions and move to schema.
• Add readOnlyHint: true to all tool definitions in the schema to signal to agents that these tools are safe to call without confirmation and can be retried without side effects.