change_email_quota

THE RISK

Medium Risk

Why change_email_quota needs a policy

This tool modifies email account quota settings, which is a reversible change to account configuration. It does not delete data, execute arbitrary code, or create financial obligations. However, it could impact email service availability if set to 0 or excessively low values, warranting medium severity given the operational impact on email functionality.

From the tool's definition Tool name 'change_email_quota' and description 'Change mailbox quota for an email account' indicate modification of email account settings. The action modifies configuration parameters reversibly.

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

POLICY

How to control change_email_quota

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 change_email_quota:

policy.json

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

change_email_quota 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 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.

LIMIT 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.
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_email_quota

What does the change_email_quota tool do? +

Change mailbox quota for an email account. It is categorised as a Write tool in the cPanel 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_email_quota? +

Register the cPanel MCP Server MCP server in PolicyLayer and add a rule for change_email_quota: 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 change_email_quota? +

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

Can I rate-limit change_email_quota? +

Yes. Add a rate_limit block to the change_email_quota 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_email_quota completely? +

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

change_email_quota 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 →