Suppose an MCP tool executes SQL and could delete a production table. How would you ensure the MCP server prevents this?

Preventing accidental destructive operations requires a combination of permissions, validation, and workflow controls. First, enforce role‑based access control so that the MCP service runs with a read‑only database role; any DDL or DELETE statements are rejected by the database engine. Second, implement a query validation layer that parses incoming SQL, rejects any statement containing DROP, TRUNCATE, or DELETE unless it is wrapped in a transaction with an explicit approval flag. Third, use a sandbox environment: the MCP tool first runs the query against a replica database; if the result set is acceptable, a manual or automated approval step promotes the change to production. Fourth, maintain a change‑log and audit trail; any attempted destructive operation triggers an alert and is logged for compliance. Finally, integrate transactional safeguards such as two‑phase commit or write‑ahead logs so that accidental deletes can be rolled back. Together, these controls make destructive SQL execution from the MCP server effectively impossible.