sequel-mcp demonstrates solid foundational quality with 23 well-named tools covering database operations, policy management, and audit trails. All tools have descriptions (10-200 chars, within baseline range) and explicit input schemas with typed parameters. However, output schemas are not documented in the visible code, parameter descriptions lack depth (many are 1-2 sentences without format/constraint details), and error handling guidance is minimal. Security-sensitive tools (execute, restore_backup) lack confirmation/dry-run patterns despite destructive risk. Tool composition is sound, each tool has one responsibility, but some parameter relationships (e.g., policy object structure) are underdocumented.

• Document output schemas for all tools. For query/execute, specify: {rows: [{col1: string, col2: number, ...}], affected_rows?: number, execution_time_ms: number}. For list_connections, specify: {connections: [{name: string, type: 'mysql'|'sqlite', host?: string, path?: string}]}.
• Expand policy parameter descriptions. Define PartialPolicy structure: 'Object with optional fields: allow_read (bool), allow_write (bool), allow_ddl (bool), require_confirmation (bool). Example: {allow_read: true, allow_write: false}'.
• Add dry-run support to execute, restore_backup, and cleanup_audit. Modify descriptions: 'Set dry_run=true to preview changes without executing. Default: false for execute, true for restore_backup/cleanup_audit.'
• Enumerate SSH parameter values in add_connection description. Replace 'nc (default), ncat, or socat' with explicit enum in schema. Same for ssh_host_key_policy: 'lenient (default, accepts any key) or strict (requires known_hosts entry)'.
• Add error recovery guidance to tool descriptions. E.g., execute: 'On policy violation, the error will indicate which table rule blocked the action. Call get_table_policy(table) to review restrictions, then retry with a different query or request user confirmation.'

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

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