SafeMySQLMcpServer has well-structured tool definitions with consistent naming (verb_noun pattern: query, list_databases, describe_table, etc.) and complete input schemas visible in internal/mcp/tools.go. However, descriptions are minimal (10-30 chars), parameter descriptions are absent or trivial, and output schemas are not documented. The server implements basic security (audit, auth, validation imports) but lacks error recovery guidance and tool annotations. No evidence of pagination, result limits enforcement, or idempotent operation patterns despite handling potentially large result sets.

• Expand tool descriptions to 100-200 chars. Example for query: 'Execute a SQL query on the specified database. Use for SELECT, INSERT, UPDATE, DELETE. Supports transactions. Returns rows, affected count, and warnings. Max 10000 rows; use LIMIT for large datasets. Requires read or write permission on target database.'
• Add parameter descriptions with format/constraint details. Example: 'database: Database name (alphanumeric, 1-64 chars, case-sensitive). Must exist and be accessible to current user.' 'sql: SQL statement (SELECT, INSERT, UPDATE, DELETE, EXPLAIN). Max 100KB. Parameterized queries recommended to prevent injection.'
• Document output schemas in tool definitions. Include field names, types, and meanings. Example: 'Returns {columns: [string], rows: [[any]], rows_affected: int, last_insert_id: int, warnings: [string]}. rows is empty for non-SELECT queries.'
• Add limit and offset parameters to list_tables and search_tables. Update descriptions: 'Returns up to 100 tables per call. Use offset for pagination. Total count included in response.'
• Add tool annotations via MCP SDK. Mark query with destructiveHint=true if SQL contains INSERT/UPDATE/DELETE. Mark read-only tools with readOnlyHint=true. Mark idempotent tools with idempotentHint=true.