The server defines 5 tools with basic structure, names, and descriptions. All tools are explicitly registered with @mcp.tool() decorators and have input schemas. However, descriptions are generic and lack LLM-optimization guidance. Parameter descriptions exist but are minimal (10-30 chars). Output schemas are not formally documented. Error handling is present but limited (single 'Food not found' check in log_food). Security patterns for input validation are weak. The schema quality is adequate but not excellent, parameters lack constraints, enums, ranges, and validation rules. The naming is mostly clear (verb_noun convention) but descriptions don't answer WHEN to use each tool or explain state-changing implications clearly.

• Add output schema definitions for all tools. For get_meals, document: { date: string, meals: { [mealName: string]: Array<{ log_id: int, food: string, quantity: number, calories_per_serving: int, protein_per_serving: number, carbs_per_serving: number, fat_per_serving: number, calories_total: number }> } }. This enables LLM to parse and chain results.
• Enhance parameter descriptions with actionable context. E.g., 'meal (string, optional, default: "unspecified"): Meal classification. Use standard meal types: breakfast, lunch, dinner, snack. If the user doesn't specify, use "unspecified". Custom names are allowed.'
• Add numeric constraints to parameters: 'calories (integer, required, 0 - 10000): Daily calorie goal. Must be positive. Typical range: 1200 - 3500 for most adults.'
• Add error recovery guidance to log_food: 'If food not found, first call add_food(name, calories, protein, carbs, fat) to record it, then retry log_food().'
• Augment tool descriptions to declare idempotency: add_food: 'Add or update a food. If a food with this name exists, replace it. Idempotent, safe to call multiple times with the same inputs.'
• Remove 'db_path' from response. Agents don't need to know where the database lives. Return only: { status: "ok", food: name }.
• Add per-tool permission hints in descriptions. E.g., 'Requires: write:nutrition-log' to hint at least-privilege agent configurations.
• Implement structured error responses with recovery hints. Instead of {status: error, message: 'Food not found'}, return {status: 'error', message: 'Food "banana" not found', recovery: 'Call add_food(name="banana", calories=89, ...) first.'}.