This server has 4 tools with partial schemas and descriptions, but significant gaps in quality. All tools have basic descriptions (10-100+ chars), and most have input schemas with type definitions, but lack critical depth. Parameters are largely undescribed or under-specified. No output schemas are documented. Error handling is minimal, most tools just raise generic exceptions. The tool names are reasonably verb-forward (search_*, get_*, create_*), but parameter naming is inconsistent (departure_id vs from/to in legs array). Critical issue: tools are mixing concerns (search_multi_city accepts free-form legs array instead of structured parameters like origin/destination), and there is no guidance on when to use one tool vs another. The server exposes external API calls directly without adequate input validation or error recovery. Overall, the implementation is functional but would not pass code review for a production agent toolkit.

• Document the output schema for each tool. Example: search_flights should return {flights: [{id, departure_time, arrival_time, price, airline, ...}], total_results, next_page_token}. This enables LLMs to chain tools confidently.
• Add explicit parameter descriptions with format and constraint guidance. E.g., 'departure_id: IATA airport code (3 uppercase letters, e.g. LAX). Invalid codes will raise a 400 error, see available airports via mcp://airports resource.'
• Clarify tool boundaries: add a description distinguishing search_flights (simple one-way/round-trip) from search_multi_city (3+ legs). Recommend search_flights for most users unless itinerary is genuinely multi-leg.
• Implement input validation with actionable error messages. Example: if travel_class is not in {economy, premium_economy, business, first}, raise 'Invalid travel_class: got "luxe", must be one of: economy, premium_economy, business, first.'
• Add error recovery guidance in tool descriptions. E.g., 'If search fails with HTTP 400, invalid airport codes may be provided, try mcp://airports to find correct codes.'
• For get_flight_details, document that flight_id comes from search_flights results. Add a dependency hint: 'Requires a flight_id from search_flights() first.'
• For search_multi_city, add a note that legs must have at least 2 entries and dates should be ISO 8601. Validate this at entry; return a structured error if violated.
• Add per-tool success/failure indicators to multi-city results. If one leg fails, return {status: 'partial', successful_legs: [...], failed_legs: [{leg, error}]}.