acme_dns_authenticator_list

List all configured ACME DNS authenticators. These are used for DNS-01 challenge validation when issuing ACME certificates.

SERVERTruenas SOURCEspranab/truenas-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/spranab-truenas-mcp/acme-dns-authenticator-list.md

WHAT IT DOES

What acme_dns_authenticator_list does on Truenas

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

RISK

Why acme_dns_authenticator_list is rated Low

The tool only retrieves and displays a read-only list of ACME DNS authenticator configurations. It performs no modifications, deletions, or triggering of external actions. Even if an agent views this list, it cannot cause harmful outcomes without subsequent Write or Execute operations. The blast radius is minimal—at worst, an agent learns about existing DNS authenticator configurations.

From the tool's definition 'List all configured ACME DNS authenticators' - this is a list/query operation that retrieves existing configuration data without modification or side effects.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs acme_dns_authenticator_list 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 acme_dns_authenticator_list, this is the rule to start with:

acme_dns_authenticator_list Allowed

acme_dns_authenticator_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": {
    "acme_dns_authenticator_list": {}
  }
}

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

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

FAQ

Questions about acme_dns_authenticator_list

What does the acme_dns_authenticator_list tool do? +

List all configured ACME DNS authenticators. These are used for DNS-01 challenge validation when issuing ACME certificates. It is categorised as a Read tool in the Truenas MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on acme_dns_authenticator_list? +

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

What risk level is acme_dns_authenticator_list? +

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

Can I rate-limit acme_dns_authenticator_list? +

Yes. Add a rate_limit block to the acme_dns_authenticator_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 acme_dns_authenticator_list completely? +

Set action: deny in the PolicyLayer policy for acme_dns_authenticator_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 acme_dns_authenticator_list? +

acme_dns_authenticator_list 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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