user_list

List all users on the TrueNAS system, including system and local accounts.

SERVERNasbridge SOURCEmaverick0628/nasbridge

Low RISK CLASS

Category Read

Parameters 00 required

Recommended Allowedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/nasbridge/user-list.md

WHAT IT DOES

What user_list does on Nasbridge

AI agents call user_list to retrieve information from Nasbridge without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

RISK

Why user_list is rated Low

This tool retrieves information about user accounts without modifying, executing, or destroying any data. It is a standard read operation used for inventory or monitoring purposes. The blast radius of misuse is minimal—an agent could only view user information that may already be accessible through normal system administration.

From the tool's definition Tool name 'user_list' and description 'List all users on the TrueNAS system' indicate a query/retrieval operation with no side effects.

Risk signalsBulk/mass operation — affects multiple targets

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs user_list safely

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

user_list Allowed

user_list is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

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

ALLOW ONLY THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Nasbridge, apply this rule, and every user_list call is checked against it from then on.

FAQ

Questions about user_list

What does the user_list tool do? +

List all users on the TrueNAS system, including system and local accounts. It is categorised as a Read tool in the Nasbridge MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on user_list? +

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

What risk level is user_list? +

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

Can I rate-limit user_list? +

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

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

user_list is provided by the Nasbridge MCP server (maverick0628/nasbridge). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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