set_vm_display · Mcp Utm MCP: Risk & Policy

WHAT IT DOES

What set_vm_display does on Mcp Utm

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

WHY IT NEEDS A POLICY

Why set_vm_display needs a policy

This tool modifies a VM display setting (dynamic resolution) which is a reversible configuration change. It does not delete data, execute code, or involve financial transactions. The blast radius is low as it only affects the display resolution behavior of a VM.

From the tool's definition Toggle dynamic resolution on the VM display

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

set_vm_display Rate-limited

set_vm_display 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": {
    "set_vm_display": {
      "limits": [
        {
          "counter": "set_vm_display_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 Mcp Utm, so you can run agents against it safely.

FAQ

Questions about set_vm_display

What does the set_vm_display tool do? +

Toggle dynamic resolution on the VM display. It is categorised as a Write tool in the Mcp Utm MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on set_vm_display? +

Register the Mcp Utm MCP server in PolicyLayer and add a rule for set_vm_display: 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 Mcp Utm. Nothing to install.

What risk level is set_vm_display? +

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

Can I rate-limit set_vm_display? +

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

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

set_vm_display is provided by the Mcp Utm MCP server (neverprepared/mcp-utm). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.