list_users

List all users in Proxmox.

SERVERProxmox MCP Server SOURCEgethosthewalrus/proxmox-mcp

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/gethosthewalrus-proxmox-mcp/list-users.md

WHAT IT DOES

What list_users does on Proxmox MCP Server

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

RISK

Why list_users is rated Low

This tool retrieves user information from the Proxmox system without creating, modifying, or deleting data. It has no side effects beyond querying. However, it returns sensitive information (user account details) which could be valuable for reconnaissance in a Proxmox infrastructure attack, justifying medium severity rather than low.

From the tool's definition Tool name 'list_users' combined with description 'List all users in Proxmox' indicates retrieval of user data without modification. The action is a read operation that queries existing data.

Risk signalsBulk/mass operation — affects multiple targets

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs list_users safely

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

list_users Allowed

list_users 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": {
    "list_users": {}
  }
}

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

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

FAQ

Questions about list_users

What does the list_users tool do? +

List all users in Proxmox. It is categorised as a Read tool in the Proxmox MCP Server MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on list_users? +

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

What risk level is list_users? +

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

Can I rate-limit list_users? +

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

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

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

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