certificate_list

List all certificates on the system, including self-signed, imported, CSR, and 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/certificate-list.md

WHAT IT DOES

What certificate_list does on Truenas

AI agents call certificate_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 certificate_list is rated Low

This tool retrieves and enumerates certificates without creating, modifying, deleting, or executing any operations. It is a pure data retrieval operation with minimal blast radius—listing certificates reveals system configuration details but does not alter state or enable harmful actions on its own.

From the tool's definition Tool name 'certificate_list' and description 'List all certificates on the system' indicate a query/retrieval operation with no modification or side effects.

Attacks that exploit this kind of access

RECOMMENDED RULE

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

certificate_list Allowed

certificate_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": {
    "certificate_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 certificate_list call is checked against it from then on.

FAQ

Questions about certificate_list

What does the certificate_list tool do? +

List all certificates on the system, including self-signed, imported, CSR, and 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 certificate_list? +

Register the Truenas MCP server in PolicyLayer and add a rule for certificate_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 certificate_list? +

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

Can I rate-limit certificate_list? +

Yes. Add a rate_limit block to the certificate_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 certificate_list completely? +

Set action: deny in the PolicyLayer policy for certificate_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 certificate_list? +

certificate_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.

KEEP EXPLORING

More on Truenas, and thousands of servers like it.

This server

All 279 Truenas tools →

Across the catalogue

aiva_list_affiliates on AIVA MCP Server →list_circuits on 0gzk →list_agents on 0rca Dojo MCP Server → The MCP Attack Database →

Guides

Roll out MCP under one policy →Data exfiltration →MCP token cost →