Remove a firewall rule from a role by its index. Use get_role to see current rules.
AI agents call remove_firewall_rule to permanently remove resources in Defined — typically in cleanup and lifecycle workflows. It does its job in a single call, and there is no undo.
Removing a firewall rule is a destructive, irreversible action. It deletes a security policy that controls network access, and once removed, that rule no longer protects the network. Misuse could open security gaps by eliminating firewall restrictions, making the blast radius high.
From the tool's definition 'Remove a firewall rule from a role by its index' — permanently removes a firewall rule, which is an irreversible deletion of a network security configuration.
Attacks that exploit this kind of access
Remove a firewall rule from a role by its index. Use get_role to see current rules. It is categorised as a Destructive tool in the Defined MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.
Register the Defined MCP server in PolicyLayer and add a rule for remove_firewall_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 Defined. Nothing to install.
remove_firewall_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 remove_firewall_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 remove_firewall_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.
remove_firewall_rule is provided by the Defined MCP server (quickvm/defined-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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