create-user · Advanced Keycloak MCP server MCP

WHAT IT DOES

What create-user does on Advanced Keycloak MCP server

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

WHY IT NEEDS A POLICY

Why create-user needs a policy

This tool creates new user accounts in an identity management system. While reversible (users can be deleted), it has high severity because creating unauthorized users grants access to systems and can establish persistence mechanisms for attackers. It is Write rather than Destructive because account creation is not irreversible—accounts can be removed.

From the tool's definition Tool name is 'create-user' and description states 'Create a new user in a specific realm' — this creates a new identity/account in Keycloak, a reversible operation.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

create-user Rate-limited

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": {
    "create-user": {
      "limits": [
        {
          "counter": "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 Advanced Keycloak MCP server, so you can run agents against it safely.

FAQ

Questions about create-user

What does the create-user tool do? +

Create a new user in a specific realm. It is categorised as a Write tool in the Advanced Keycloak 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 create-user? +

Register the Advanced Keycloak MCP server MCP server in PolicyLayer and add a rule for 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 Advanced Keycloak MCP server. Nothing to install.

What risk level is create-user? +

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

Can I rate-limit create-user? +

Yes. Add a rate_limit block to the 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 create-user completely? +

Set action: deny in the PolicyLayer policy for 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 create-user? +

create-user is provided by the Advanced Keycloak MCP server MCP server (octodet/keycloak-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.