Low Risk

ListStorageControllers

List storage controllers for a virtual machine.

How to control ListStorageControllers ↓

What ListStorageControllers does on Virtualization

AI agents call ListStorageControllers to retrieve information from Virtualization without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

Low Risk

Why ListStorageControllers needs a policy

This tool retrieves and queries configuration information about storage controllers attached to a VM. It performs a read-only operation with no side effects, capability to execute code, delete data, or commit financial transactions. The blast radius of misuse is minimal—an agent could only learn what storage controllers exist on a VM.

From the tool's definition Tool name is 'ListStorageControllers' and description states it 'List storage controllers for a virtual machine' — a query operation with no modification or side effects.

Documented attack patterns abuse exactly the kind of access ListStorageControllers gives an agent:

How to control ListStorageControllers

PolicyLayer is an MCP gateway — it sits between your AI agents and Virtualization, and nothing reaches the server without passing your rules. This is the rule we recommend for ListStorageControllers:

policy.json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "ListStorageControllers": {}
  }
}

ListStorageControllers is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.

  1. Create a free account and register Virtualization — nothing to install.
  2. Add this policy — paste it, or build it visually.
  3. Point your MCP client (Claude, Cursor, anything) at your gateway URL.
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Related tools and policies

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Questions about ListStorageControllers

What does the ListStorageControllers tool do? +

List storage controllers for a virtual machine. It is categorised as a Read tool in the Virtualization MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on ListStorageControllers? +

Register the Virtualization MCP server in PolicyLayer and add a rule for ListStorageControllers: 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 Virtualization. Nothing to install.

What risk level is ListStorageControllers? +

ListStorageControllers is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit ListStorageControllers? +

Yes. Add a rate_limit block to the ListStorageControllers 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.

How do I block ListStorageControllers completely? +

Set action: deny in the PolicyLayer policy for ListStorageControllers. 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.

What MCP server provides ListStorageControllers? +

ListStorageControllers is provided by the Virtualization MCP server (sandraschi/virtualization-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Virtualization tool call.

Start from Virtualization, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

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56 Virtualization tools catalogued and risk-classified — across an index of 43,000+ MCP servers.

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