This server demonstrates reasonable structure with 9 well-defined tools, consistent naming conventions, and documented schemas. However, multiple tools lack sufficient parameter descriptions, and several descriptions are generic or minimal. The server follows basic patterns but falls short of production-grade quality. Naming is consistently verb-prefixed (db_*, execute_*, list_*, describe_*, generate_*), which is positive. Input schemas are visible and properly typed in the source. However, many parameter descriptions are single-word or very brief, and output schemas are not documented in the visible code. Error handling is present (try/catch in mcp-server.ts) but generic. The Chinese descriptions are clear but some are quite brief.

• Expand parameter descriptions to 50 - 150 characters each. For execute_query's 'limit' parameter: 'Maximum number of rows to return (1 - 10000, default 100). Applies only to SELECT queries.' For 'params': 'Array of values to bind to ? placeholders in the SQL statement, in order. E.g., for 'SELECT * FROM users WHERE id = ?' pass [123].'
• Document output schemas explicitly. Add a 'Returns' section to each tool description or provide a separate JSON Schema for responses. E.g., execute_query returns an object with { success: boolean, rows: array, rowCount: number, affectedRows: number, columns: string[] }.
• Split execute_query into two tools: execute_select_query (read-only, returns rows) and execute_write_query (INSERT/UPDATE/DELETE, returns affected row count). Allows clearer intent signaling and separate error recovery paths.
• Enhance error messages with recovery guidance. In execute_query's catch block, detect error type (connection failed, syntax error, table not found) and return actionable guidance: 'Table "orders" not found. Call list_tables() to see available tables.' or 'SQL syntax error near "SELCT". Did you mean SELECT?'
• Add optional minimum/maximum constraints to numeric parameters. For execute_query's limit: declare min=1, max=10000 in JSON Schema and repeat in description.
• Consider adding describe_tables(names: string[]) to batch describe operations, reducing multi-tool calls for common use cases like 'what are the schemas of users, orders, and products?'
• Add a 'preview_sql' parameter to db_connect and db_disconnect to enable confirmation workflows before destructive state changes, following pattern:confirmation-request.

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

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