AI agents call get_available_package_versions 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.
This tool retrieves information about available package versions without modifying, executing code, deleting data, or engaging in financial transactions. The 'get' verb is strongly associated with read operations. Even in a network security management context (FortiManager), retrieving version metadata is fundamentally a query operation with minimal blast radius.
From the tool's definition Tool name 'get_available_package_versions' indicates a retrieval operation (get/list). Description is empty, but the verb 'get' and context of querying FortiManager for version information strongly suggests a read-only query with no side effects.
Documented attack patterns abuse exactly the kind of access get_available_package_versions 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_available_package_versions:
{
"version": "1",
"default": "deny",
"tools": {
"get_available_package_versions": {}
}
}get_available_package_versions is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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get_available_package_versions. 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_available_package_versions: 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_available_package_versions 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_available_package_versions 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_available_package_versions. 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_available_package_versions 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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