Delete a suppression rule. WRITE OPERATION — requires confirm: true. NOTE: deleting a rule does NOT un-suppress detections it previously matched; they remain in the suppressed state with the deleted rule_id attached.
AI agents call delete_suppression_rule to permanently remove resources in Stepsecurity — 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 delete_suppression_rule doesn't hesitate, doesn't double-check, and doesn't stop at one. Whatever it removes from Stepsecurity is gone — there is no undo for destructive operations.
Attacks that exploit this kind of access
Delete a suppression rule. WRITE OPERATION — requires confirm: true. NOTE: deleting a rule does NOT un-suppress detections it previously matched; they remain in the suppressed state with the deleted rule_id attached. It is categorised as a Destructive tool in the Stepsecurity MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.
Register the Stepsecurity MCP server in PolicyLayer and add a rule for delete_suppression_rule: 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 Stepsecurity. Nothing to install.
delete_suppression_rule 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 delete_suppression_rule 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 delete_suppression_rule. 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.
delete_suppression_rule is provided by the Stepsecurity MCP server (step-security/stepsecurity-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.