Revoke privileges on all tables in a schema from a role
AI agents call db_revoke_all_tables_in_schema to permanently remove resources in Database MCP Server — typically in cleanup and lifecycle workflows. It does its job in a single call, and there is no undo.
An AI agent that decides to call db_revoke_all_tables_in_schema doesn't hesitate, doesn't double-check, and doesn't stop at one. Whatever it removes from Database MCP Server is gone — there is no undo for destructive operations.
Attacks that exploit this kind of access
Revoke privileges on all tables in a schema from a role. It is categorised as a Destructive tool in the Database MCP Server MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.
Register the Database MCP Server MCP server in PolicyLayer and add a rule for db_revoke_all_tables_in_schema: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches Database MCP Server. Nothing to install.
db_revoke_all_tables_in_schema is a Destructive tool with critical risk. Critical-risk tools should be blocked by default and only enabled with explicit human approval.
Yes. Add a rate_limit block to the db_revoke_all_tables_in_schema rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.
Set action: deny in the PolicyLayer policy for db_revoke_all_tables_in_schema. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.
db_revoke_all_tables_in_schema is provided by the Database MCP Server MCP server (roilanrodriguez55/database-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
Teams ship this data inside their own products. See what a licence covers →