change_service_offering_virtual_machine

THE RISK

Medium Risk

Why change_service_offering_virtual_machine needs a policy

This tool modifies the service offering (CPU, memory, etc.) of a virtual machine, which is a reversible configuration change. It does not delete data or move money, but misuse could cause downtime or resource over-provisioning, making the blast radius high.

From the tool's definition Change service offering for virtual machine

Documented attack patterns abuse exactly the kind of access change_service_offering_virtual_machine gives an agent:

POLICY

How to control change_service_offering_virtual_machine

PolicyLayer is an MCP gateway — it sits between your AI agents and CloudStack MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for change_service_offering_virtual_machine:

policy.json

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

change_service_offering_virtual_machine 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.

Create a free account and register CloudStack MCP Server — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

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EXPLORE

Related tools and policies

More CloudStack MCP Server tools

Destructive destroy_virtual_machine Destroy a virtual machine using proper workflow: stop → destroy → expunge. Handles VMs in Execute deploy_virtual_machine Deploy a new virtual machine Execute scale_virtual_machine Scale virtual machine (change service offering) Execute start_virtual_machine Start a virtual machine Execute stop_virtual_machine Stop a virtual machine Execute reboot_virtual_machine Reboot a virtual machine Execute migrate_virtual_machine Migrate virtual machine to another host Write reset_password_virtual_machine Reset password for virtual machine

All 45 CloudStack MCP Server tools →

Write tools on other servers

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Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Argument validation → Checking tool call arguments against schema and policy before they run.
Scoped token → Per-person credentials that grant a defined subset of servers and tools.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about change_service_offering_virtual_machine

What does the change_service_offering_virtual_machine tool do? +

Change service offering for 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 change_service_offering_virtual_machine? +

Register the CloudStack MCP Server MCP server in PolicyLayer and add a rule for change_service_offering_virtual_machine: 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 change_service_offering_virtual_machine? +

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

Can I rate-limit change_service_offering_virtual_machine? +

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

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

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

Enforce policy on every CloudStack MCP Server tool call.

Start from CloudStack MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

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