This server exhibits significant quality gaps across naming, descriptions, schemas, and error handling. While 8 tools are registered with basic schemas, most lack adequate descriptions for LLM guidance. Tool naming is inconsistent (some verbs missing). Parameter descriptions are sparse or missing entirely. No structured error handling or recovery guidance. No output schemas documented. Several tools show signs of inferred definitions rather than explicit registration. The server mixes unrelated concerns (PostgreSQL introspection, hotel booking) without clear composition patterns. No security annotations, permission gates, or audit trails visible.

• Document output schemas for every tool. Define the exact fields, types, and example values returned. For search-hotels-by-name, document: {hotels: [{id: int, name: string, location: string, booked: boolean}, ...]}.
• Add 10-50 character parameter descriptions explaining format, range, and constraints. E.g., limit in get-sample-data: 'Maximum rows to return (1-1000, default 5)'. location in search-hotels-by-location: 'Partial city name, case-insensitive (e.g., 'New York', 'SF').'
• Implement input validation and return structured error responses. For invalid table_name, return: {error: 'Invalid table', message: 'Table "xyz" not found', suggestion: 'Available tables: [list]. Try one of these.'}
• Parameterize all SQL queries. Replace f-string in get-sample-data with proper parameterized query: use psycopg2's prepared statements or ORM to prevent SQL injection.
• Add permission checks to write operations. Before book-hotel executes, verify user_id is valid and has permission. Return 403 Unauthorized with guidance if denied.
• Consolidate tool definitions into a single registry or configuration. Remove duplicate definitions across server/app.py, mcp_fastapi/hotel_agent_ver1.py, and google-adk/hotel_agent.py. Use one source of truth.
• Add idempotency tokens to write operations. Accept an optional idempotency_key parameter; check if this key was already processed. Return cached result if present. Prevents duplicate bookings on retry.
• Implement audit logging. Log every tool call with user_id, timestamp, tool_name, parameters (sanitized), and result. Store in persistent audit table for compliance.

Inferred effective spec: <=2025-11-25.

• Relies on Logging (deprecated) - log to stderr or use OpenTelemetry