create_access_list · Nginx Proxy Manager MCP: Risk & Policy

WHAT IT DOES

What create_access_list does on Nginx Proxy Manager MCP

AI agents use create_access_list to create or update resources in Nginx Proxy Manager MCP — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Nginx Proxy Manager MCP environment.

WHY IT NEEDS A POLICY

Why create_access_list needs a policy

This tool creates (writes) a new access list configuration in Nginx Proxy Manager. The action is reversible — access lists can be deleted or modified later. It does not execute arbitrary code, does not delete data irreversibly, does not move money, and does not query/retrieve data without side effects.

From the tool's definition Tool name 'create_access_list' and description 'Create a new access list' indicate data creation. Paired with sibling tools like 'delete_access_list', 'delete_proxy_host', and 'delete_certificate', this server manages reversible infrastructure configuration…

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

create_access_list Rate-limited

create_access_list 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": {
    "create_access_list": {
      "limits": [
        {
          "counter": "create_access_list_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Nginx Proxy Manager MCP, so you can run agents against it safely.

FAQ

Questions about create_access_list

What does the create_access_list tool do? +

Create a new access list. It is categorised as a Write tool in the Nginx Proxy Manager MCP MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on create_access_list? +

Register the Nginx Proxy Manager MCP server in PolicyLayer and add a rule for create_access_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 Nginx Proxy Manager MCP. Nothing to install.

What risk level is create_access_list? +

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

Can I rate-limit create_access_list? +

Yes. Add a rate_limit block to the create_access_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 create_access_list completely? +

Set action: deny in the PolicyLayer policy for create_access_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 create_access_list? +

create_access_list is provided by the Nginx Proxy Manager MCP server (verybigsad/nginx-proxy-manager-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.