unmount_iso · KVMFleet MCP Server MCP: Risk & Policy

WHAT IT DOES

What unmount_iso does on KVMFleet MCP Server

AI agents invoke unmount_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 unmount_iso needs a policy

Unmounting/ejecting virtual media is an active operation that modifies the state of a remote KVM device. While it is described as idempotent and doesn't delete data permanently, it triggers an external operation (ejecting media from a device) that goes beyond a simple read.

From the tool's definition 'Eject any virtual media currently mounted on the device' — triggers an external hardware/firmware operation on a KVM device

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

unmount_iso Rate-limited

unmount_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": {
    "unmount_iso": {
      "limits": [
        {
          "counter": "unmount_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 unmount_iso

What does the unmount_iso tool do? +

Eject any virtual media currently mounted on the device. Idempotent. 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 unmount_iso? +

Register the KVMFleet MCP Server MCP server in PolicyLayer and add a rule for unmount_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 unmount_iso? +

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

Can I rate-limit unmount_iso? +

Yes. Add a rate_limit block to the unmount_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 unmount_iso completely? +

Set action: deny in the PolicyLayer policy for unmount_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 unmount_iso? +

unmount_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.

// THE FULL RECORD

unmount_iso is one line of KVMFleet MCP Server's registry record.

The record carries the whole server: verified identity, auth posture, risk grade, every tool classified, recommended policy — re-checked continuously.

Teams ship this data inside their own products. See what a licence covers →