Server has 5 well-defined tools with explicit schemas, descriptions, and tool annotations. Naming follows verb_noun pattern (find_, why_, region_, estimate_). Descriptions are detailed (150-300 chars) and domain-specific. All parameters have types and descriptions. However, output schemas are not formally documented, responses are constructed as text blocks rather than structured objects. Error handling is minimal (only one generic 'not found' case visible). Tool composition is sound: each tool has a single responsibility, and outputs include references (kakaoMapLink) for chaining.

• Define explicit output schemas for all tools. E.g., find_tax_restaurant should return {restaurants: [{name, grade, visitCount, departments, address, trustScore, ...}], total: number, nextCursor?: string}. Document in tool registration.
• Add min/max constraints to numeric parameters: limit should be 1-50 (with default 5), headcount should be 1-100. Include in parameter descriptions and Zod schema.
• Implement structured error responses: {error: string, code: 'NOT_FOUND'|'INVALID_INPUT'|'AMBIGUOUS', suggestions?: string[]}. Return actionable guidance for each failure mode.
• Enhance region_top_card description to clarify output format: 'Generates a shareable SVG card image (base64-encoded) showing the top 5 restaurants in the region, ready to share on KakaoTalk.'
• Add fuzzy name matching to estimate_budget and why_trusted. If exact match fails, search for similar names and return 'Did you mean: [suggestions]?' instead of a bare 'not found'.