attach_iso · CloudStack MCP Server MCP: Risk & Policy

WHAT IT DOES

What attach_iso does on CloudStack MCP Server

AI agents use attach_iso to create or update resources in CloudStack MCP Server — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your CloudStack MCP Server environment.

WHY IT NEEDS A POLICY

Why attach_iso needs a policy

This tool modifies VM state by attaching an ISO image, which is a reversible write operation. It does not delete data (ruling out Destructive), execute arbitrary code on the target system (ruling out Execute as primary category), or move money (ruling out Financial).

From the tool's definition Tool name 'attach_iso' and description 'Attach ISO to a virtual machine' indicates a modification operation on VM configuration. ISO attachment is a state change that modifies the VM's attached media, though the operation is reversible (ISO can be detached).

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

attach_iso Rate-limited

attach_iso 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.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "attach_iso": {
      "limits": [
        {
          "counter": "attach_iso_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches CloudStack MCP Server, so you can run agents against it safely.

FAQ

Questions about attach_iso

What does the attach_iso tool do? +

Attach ISO to a virtual machine. It is categorised as a Write tool in the CloudStack MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on attach_iso? +

Register the CloudStack MCP Server MCP server in PolicyLayer and add a rule for attach_iso: 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 CloudStack MCP Server. Nothing to install.

What risk level is attach_iso? +

attach_iso is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit attach_iso? +

Yes. Add a rate_limit block to the attach_iso 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 attach_iso completely? +

Set action: deny in the PolicyLayer policy for attach_iso. 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 attach_iso? +

attach_iso is provided by the CloudStack MCP Server MCP server (mozg31337/cloudstack-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.