Permanently delete a regex.
AI agents call delete_regex to permanently remove resources in Firegex — typically in cleanup and lifecycle workflows. It does its job in a single call, and there is no undo.
This tool irreversibly removes a regex rule from the Firegex firewall system. Deletion is a destructive operation with no undo mechanism. An AI agent misusing this tool could disable critical firewall protections by deleting essential regex rules, exposing systems to malicious traffic. The permanent nature and potential impact on security posture classify this as Destructive with high severity.
From the tool's definition Tool name is 'delete_regex' and description states 'Permanently delete a regex.' The use of 'Permanently delete' indicates an irreversible action that cannot be undone.
Attacks that exploit this kind of access
Permanently delete a regex. It is categorised as a Destructive tool in the Firegex MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.
Register the Firegex MCP server in PolicyLayer and add a rule for delete_regex: 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 Firegex. Nothing to install.
delete_regex 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_regex 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_regex. 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_regex is provided by the Firegex MCP server (umbra2728/firegex-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.
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