resize_volume · CloudStack MCP Server MCP: Risk & Policy

WHAT IT DOES

What resize_volume does on CloudStack MCP Server

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

WHY IT NEEDS A POLICY

Why resize_volume needs a policy

The tool resizes a volume, which modifies infrastructure state. This is a Write operation because resizing is typically reversible (can be resized again to original or different size). However, severity is high because resizing storage can impact running systems, cause service degradation, or in some cases data loss if reduced below usage capacity.

From the tool's definition Tool name: 'resize_volume'. Description: 'Resize a volume'. This modifies storage configuration by changing volume size, which is a reversible data modification operation.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

resize_volume Rate-limited

resize_volume 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": {
    "resize_volume": {
      "limits": [
        {
          "counter": "resize_volume_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 CloudStack MCP Server, so you can run agents against it safely.

FAQ

Questions about resize_volume

What does the resize_volume tool do? +

Resize a volume. 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 resize_volume? +

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

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

Can I rate-limit resize_volume? +

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

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

resize_volume is provided by the CloudStack MCP Server MCP server (mozg31337/cloudstack-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.