Four well-defined read-only tools with complete input schemas, clear descriptions (150 - 250 chars), and proper enum constraints. All parameters are typed and described. Tool names follow verb_noun convention (convert_, calculate_, lookup_, list_). Output schemas are not explicitly documented in the source, which is a notable gap. Error handling is basic, no recovery guidance or actionable error messages visible. Descriptions are LLM-optimized and include context (e.g., 'Always cite sourceUrl', 'WSAVA/AAHA-style multipliers'). No security concerns (read-only, no secrets). Composition is sound, tools are single-purpose and chainable (e.g., list_supported_breeds → lookup_ideal_weight).

• Document output schemas for all four tools. Specify return type (object with fields: cups, grams, sourceUrl for convert_cup_to_grams; RER, DER, dailyBudget, treatAllowance, foodGrams, sourceUrl for calculate_pet_calories, etc.). Include field types and descriptions.
• Add error handling with recovery guidance. Example: 'If density=custom, both kcalPerCup and kcalPer100g are required. Provide values from the pet food bag label.' Classify errors as retryable (invalid input) vs fatal (breed not found).
• Expand list_supported_breeds description to explain output structure: 'Returns an array of breed objects with name (display name) and slug (URL-safe identifier). Use slug values with lookup_ideal_weight.'
• Document conditional parameter dependencies explicitly. For convert_cup_to_grams: 'When density=custom, kcalPerCup and kcalPer100g are required. Omit them for preset densities (light, standard, dense, puppy).'
• Add result limits and pagination guidance. E.g., 'list_supported_breeds returns up to 200 breeds. If truncated, results include a next_cursor for pagination.' Ensure responses stay under 10KB to avoid context bloat.