Get performance metrics for a running virtual machine.
AI agents call GetVmMetrics 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.
This tool retrieves performance data (CPU, memory, disk, network metrics) from an existing VM without creating, modifying, deleting, or executing operations. It is purely informational and poses minimal risk if misused by an AI agent—at worst, it could be polled excessively, but it has no destructive, financial, or execution side effects.
From the tool's definition Tool name and description indicate a query operation: 'Get performance metrics for a running virtual machine.' The verb 'Get' and the purpose of retrieving metrics denote a read-only action with no state modification.
Documented attack patterns abuse exactly the kind of access GetVmMetrics gives an agent:
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 GetVmMetrics:
{
"version": "1",
"default": "deny",
"tools": {
"GetVmMetrics": {}
}
}GetVmMetrics is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Get performance metrics for a running virtual machine. It is categorised as a Read tool in the Virtualization MCP Server, which means it retrieves data without modifying state.
Register the Virtualization MCP server in PolicyLayer and add a rule for GetVmMetrics: 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.
GetVmMetrics is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the GetVmMetrics 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.
Set action: deny in the PolicyLayer policy for GetVmMetrics. 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.
GetVmMetrics 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.
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.