get_disk_usage

THE RISK

Low Risk

Why get_disk_usage needs a policy

This tool performs a read-only query of disk usage statistics. It retrieves information about quota, used space, and limits—no side effects, no data modification, no code execution. The lowest severity is appropriate since an AI agent misusing this tool could only access usage information, which poses minimal security risk.

From the tool's definition Tool name 'get_disk_usage' and description 'Get account disk space usage summary (quota, used, limits)' indicates a retrieval operation that queries disk usage metrics without modifying, executing, or deleting anything.

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

POLICY

How to control get_disk_usage

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

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "get_disk_usage": {}
  }
}

get_disk_usage is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.

Create a free account and register cPanel 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.

CAP THIS TOOL →

Free to start. No card required.

EXPLORE

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Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Data exfiltration → How read access becomes an exfiltration channel when chained with untrusted content.
MCP token cost → What connecting this server costs in context-window tokens on every request.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about get_disk_usage

What does the get_disk_usage tool do? +

Get account disk space usage summary (quota, used, limits). It is categorised as a Read tool in the cPanel MCP Server MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on get_disk_usage? +

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

What risk level is get_disk_usage? +

get_disk_usage is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit get_disk_usage? +

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

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

get_disk_usage is provided by the cPanel MCP Server MCP server (0xhayd3n/cpanel-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 cPanel MCP Server tool call.

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

CHECK YOUR STACK →