privilege_create

Create a new privilege/role with specific permissions and group bindings.

SERVERTruenas SOURCEspranab/truenas-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/spranab-truenas-mcp/privilege-create.md

WHAT IT DOES

What privilege_create does on Truenas

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

RISK

Why privilege_create is rated Medium

Privilege creation is a Write operation—it creates new security configurations that are reversible (privileges can be deleted). However, the severity is high because misconfigured privileges could grant excessive access to system resources, potentially exposing storage, services, and configurations to unauthorized parties. The blast radius extends to all users/groups assigned the new privilege.

From the tool's definition Tool name 'privilege_create' indicates creation of new privileges/roles with 'specific permissions and group bindings.' This modifies access control configuration in TrueNAS, creating new security roles that can affect system permissions.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs privilege_create safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Truenas, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For privilege_create, this is the rule to start with:

privilege_create Rate-limited

privilege_create 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": {
    "privilege_create": {
      "limits": [
        {
          "counter": "privilege_create_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 Truenas, apply this rule, and every privilege_create call is checked against it from then on.

FAQ

Questions about privilege_create

What does the privilege_create tool do? +

Create a new privilege/role with specific permissions and group bindings. It is categorised as a Write tool in the Truenas MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on privilege_create? +

Register the Truenas MCP server in PolicyLayer and add a rule for privilege_create: 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 Truenas. Nothing to install.

What risk level is privilege_create? +

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

Can I rate-limit privilege_create? +

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

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

privilege_create is provided by the Truenas MCP server (spranab/truenas-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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