Remove an IP address from the WAF whitelist.
AI agents call waf_deny_ip to permanently remove resources in WAF MCP Server — typically in cleanup and lifecycle workflows. It does its job in a single call, and there is no undo.
Removing an IP from the WAF whitelist is an irreversible security configuration change (the whitelist entry is deleted). Unlike a soft disable, this deletion means traffic from that IP will now be subject to WAF rules again. If misused by an AI agent, it could block legitimate traffic or expose systems, making it a high-severity destructive action.
From the tool's definition "Remove an IP address from the WAF whitelist" — permanently removes an entry from the whitelist, which cannot be passively undone and immediately changes security enforcement posture.
Attacks that exploit this kind of access
Remove an IP address from the WAF whitelist. It is categorised as a Destructive tool in the WAF MCP Server MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.
Register the WAF MCP Server MCP server in PolicyLayer and add a rule for waf_deny_ip: 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 WAF MCP Server. Nothing to install.
waf_deny_ip 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 waf_deny_ip 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 waf_deny_ip. 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.
waf_deny_ip is provided by the WAF MCP Server MCP server (kratosuae/waf_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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