AI agents use create_external_threat_feed to create or update resources in Fortimanager — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Fortimanager environment.
The 'create' verb and external threat feed context indicate this writes/creates a new resource in FortiManager's configuration. While the description is empty (lowering confidence slightly), the naming convention combined with sibling tool patterns (all configuration-focused) clearly places this in Write rather than Read.
From the tool's definition Tool name 'create_external_threat_feed' indicates creation of a new threat feed resource. Given the FortiManager context (network security device management), this creates or registers external data sources that will be used in security policies.
Documented attack patterns abuse exactly the kind of access create_external_threat_feed 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 create_external_threat_feed:
{
"version": "1",
"default": "deny",
"tools": {
"create_external_threat_feed": {
"limits": [
{
"counter": "create_external_threat_feed_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}create_external_threat_feed stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.
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create_external_threat_feed. It is categorised as a Write tool in the Fortimanager MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Fortimanager MCP server in PolicyLayer and add a rule for create_external_threat_feed: 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.
create_external_threat_feed is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.
Yes. Add a rate_limit block to the create_external_threat_feed 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 create_external_threat_feed. 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.
create_external_threat_feed 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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