plone_create_user · Plone MCP Server MCP: Risk & Policy

WHAT IT DOES

What plone_create_user does on Plone MCP Server

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

WHY IT NEEDS A POLICY

Why plone_create_user needs a policy

Creating a new user account is a reversible Write operation that modifies the site's user database. It does not immediately cause Financial harm, Destructive irreversible deletion, or Execute arbitrary code; however, uncontrolled user creation could lead to privilege escalation, unauthorized access, or spam accounts.

From the tool's definition Tool name and description state 'Creates a new user' and 'Requires Manager role or self-registration to be enabled.' This is explicitly a user creation operation.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

plone_create_user Rate-limited

plone_create_user 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": {
    "plone_create_user": {
      "limits": [
        {
          "counter": "plone_create_user_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 Plone MCP Server, so you can run agents against it safely.

FAQ

Questions about plone_create_user

What does the plone_create_user tool do? +

Creates a new user in the Plone site. Requires Manager role or self-registration to be enabled. Example: plone_create_user({username:. It is categorised as a Write tool in the Plone 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 plone_create_user? +

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

What risk level is plone_create_user? +

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

Can I rate-limit plone_create_user? +

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

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

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