AI agents call get_device_oid 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 tool name suggests fetching a device OID without modification or execution. OIDs are identifiers used to reference objects in network management systems. While the empty description lowers confidence slightly, the semantic meaning of 'get' combined with the context of FortiManager (a network security appliance management platform) indicates this retrieves configuration metadata rather than executing commands or…
From the tool's definition Tool name 'get_device_oid' indicates retrieval of a device object identifier (OID), consistent with a query operation. No description provided, but the naming pattern aligns with Read category tools.
Documented attack patterns abuse exactly the kind of access get_device_oid 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 get_device_oid:
{
"version": "1",
"default": "deny",
"tools": {
"get_device_oid": {}
}
}get_device_oid is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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get_device_oid. 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 get_device_oid: 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.
get_device_oid 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 get_device_oid 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 get_device_oid. 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.
get_device_oid 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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