mount_iso · KVMFleet MCP Server MCP: Risk & Policy

WHAT IT DOES

What mount_iso does on KVMFleet MCP Server

AI agents invoke mount_iso to trigger actions in KVMFleet MCP Server. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call — builds kicked off, notifications sent, workflows started.

WHY IT NEEDS A POLICY

Why mount_iso needs a policy

Mounting an ISO as virtual media on a device triggers an external operation that changes the device's state (attaching virtual media). While the description hints at 'Destructive', mounting an ISO is not inherently irreversible — it can typically be unmounted — making Execute the more accurate category. However, it does modify device configuration and could lead to unintended boots or data exposure.

From the tool's definition Mount an ISO from the org library as virtual media on a device. Destructive —

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

mount_iso Rate-limited

mount_iso stays usable, but rate-capped — a runaway agent can't fire it dozens of times a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "mount_iso": {
      "limits": [
        {
          "counter": "mount_iso_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

RATE-LIMIT THIS TOOL →

Instant setup, no code required.

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

FAQ

Questions about mount_iso

What does the mount_iso tool do? +

Mount an ISO from the org library as virtual media on a device. Destructive —. It is categorised as a Execute tool in the KVMFleet MCP Server MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on mount_iso? +

Register the KVMFleet MCP Server MCP server in PolicyLayer and add a rule for mount_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 KVMFleet MCP Server. Nothing to install.

What risk level is mount_iso? +

mount_iso is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.

Can I rate-limit mount_iso? +

Yes. Add a rate_limit block to the mount_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 mount_iso completely? +

Set action: deny in the PolicyLayer policy for mount_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 mount_iso? +

mount_iso is provided by the KVMFleet MCP Server MCP server (kvmfleet/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.