AI agents call list_central_dnat_policies to retrieve information from Fortimanager without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The 'list' prefix indicates data retrieval. DNAT (Destination Network Address Translation) policies are configuration data on FortiManager. Reading policy configurations has minimal blast radius—it gathers information without side effects. Low severity because exposure of policy data itself is less critical than ability to modify or delete them.
From the tool's definition Tool name 'list_central_dnat_policies' uses the 'list' verb, which retrieves or queries data without modifying it. The description is empty, but the naming convention strongly suggests a read-only query operation.
Documented attack patterns abuse exactly the kind of access list_central_dnat_policies gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Fortimanager, and nothing reaches the server without passing your rules. This is the rule we recommend for list_central_dnat_policies:
{
"version": "1",
"default": "deny",
"tools": {
"list_central_dnat_policies": {}
}
}list_central_dnat_policies is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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list_central_dnat_policies. It is categorised as a Read tool in the Fortimanager MCP Server, which means it retrieves data without modifying state.
Register the Fortimanager MCP server in PolicyLayer and add a rule for list_central_dnat_policies: 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 Fortimanager. Nothing to install.
list_central_dnat_policies is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the list_central_dnat_policies 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 list_central_dnat_policies. 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.
list_central_dnat_policies is provided by the Fortimanager MCP server (jmpijll/fortimanager-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Fortimanager, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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