resize_vm_disk

Resize a VM disk. Can only grow, not shrink.

SERVERProxmox MCP Server SOURCEgethosthewalrus/proxmox-mcp

Medium RISK CLASS

Category Write

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/gethosthewalrus-proxmox-mcp/resize-vm-disk.md

WHAT IT DOES

What resize_vm_disk does on Proxmox MCP Server

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

RISK

Why resize_vm_disk is rated Medium

This tool modifies infrastructure configuration by altering VM disk sizes. While the description specifies it can only grow (not shrink), it still constitutes a Write operation—it changes persistent VM state. It is not Destructive because the operation is theoretically reversible and does not irrevocably delete data.

From the tool's definition Tool name: 'resize_vm_disk'; Description: 'Resize a VM disk. Can only grow, not shrink.' The tool modifies VM disk configuration by expanding storage capacity, which is a reversible operation (the resize itself can be undone by resizing back down, though data…

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs resize_vm_disk safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Proxmox MCP Server, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For resize_vm_disk, this is the rule to start with:

resize_vm_disk Rate-limited

resize_vm_disk 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_vm_disk": {
      "limits": [
        {
          "counter": "resize_vm_disk_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Proxmox MCP Server, apply this rule, and every resize_vm_disk call is checked against it from then on.

FAQ

Questions about resize_vm_disk

What does the resize_vm_disk tool do? +

Resize a VM disk. Can only grow, not shrink. It is categorised as a Write tool in the Proxmox 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_vm_disk? +

Register the Proxmox MCP Server MCP server in PolicyLayer and add a rule for resize_vm_disk: 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 Proxmox MCP Server. Nothing to install.

What risk level is resize_vm_disk? +

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

Can I rate-limit resize_vm_disk? +

Yes. Add a rate_limit block to the resize_vm_disk 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_vm_disk completely? +

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

resize_vm_disk is provided by the Proxmox MCP Server MCP server (gethosthewalrus/proxmox-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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