update_vm_config

A write tool on the Proxmox MCP server.

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/update-vm-config.md

WHAT IT DOES

What update_vm_config does on Proxmox MCP Server

AI agents use update_vm_config 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 update_vm_config is rated Medium

The tool modifies VM configuration settings, which is a Write operation (creates or modifies data reversibly). It does not delete (not Destructive), does not move money (not Financial), and does not execute arbitrary code (not Execute). The severity is high because misconfiguration of VMs in a production Proxmox environment could cause service disruption, though changes are typically reversible.

From the tool's definition Tool name 'update_vm_config' indicates modification of virtual machine configuration; sibling tools like 'clone_vm', 'clone_container', and other infrastructure management operations confirm this server handles state-changing operations on VMs.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs update_vm_config 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 update_vm_config, this is the rule to start with:

update_vm_config Rate-limited

update_vm_config 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": {
    "update_vm_config": {
      "limits": [
        {
          "counter": "update_vm_config_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 update_vm_config call is checked against it from then on.

FAQ

Questions about update_vm_config

What does the update_vm_config tool do? +

update_vm_config is a write tool on the Proxmox MCP Server MCP server. 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 update_vm_config? +

Register the Proxmox MCP Server MCP server in PolicyLayer and add a rule for update_vm_config: 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 update_vm_config? +

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

Can I rate-limit update_vm_config? +

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

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

update_vm_config 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.

KEEP EXPLORING

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