unifi_create_acl_rule

Create a new MAC ACL rule for Layer 2 access control within a VLAN.

SERVERUniFi Access MCP SOURCEpypi:unifi-protect-mcp

Medium RISK CLASS

Category Write

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/io-github-sirkirby-unifi-access-mcp/unifi-create-acl-rule.md

WHAT IT DOES

What unifi_create_acl_rule does on UniFi Access MCP

AI agents use unifi_create_acl_rule to create or update resources in UniFi Access MCP, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your UniFi Access MCP environment.

RISK

Why unifi_create_acl_rule is rated Medium

This tool creates (writes) a new MAC ACL rule that controls network access. While reversible (the rule can be deleted), it directly affects network security policies and access permissions. The blast radius is high because misconfigured ACL rules could block legitimate users or inadvertently grant unauthorized access to network segments.

From the tool's definition Tool name contains 'create' and description states 'Create a new MAC ACL rule'; this operation modifies network access control policies by adding new rules for Layer 2 access control.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs unifi_create_acl_rule safely

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

unifi_create_acl_rule Rate-limited

unifi_create_acl_rule 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": {
    "unifi_create_acl_rule": {
      "limits": [
        {
          "counter": "unifi_create_acl_rule_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL → Instant setup, no code required.

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

FAQ

Questions about unifi_create_acl_rule

What does the unifi_create_acl_rule tool do? +

Create a new MAC ACL rule for Layer 2 access control within a VLAN. It is categorised as a Write tool in the UniFi Access 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 unifi_create_acl_rule? +

Register the UniFi Access MCP server in PolicyLayer and add a rule for unifi_create_acl_rule: 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 UniFi Access MCP. Nothing to install.

What risk level is unifi_create_acl_rule? +

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

Can I rate-limit unifi_create_acl_rule? +

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

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

unifi_create_acl_rule is provided by the UniFi Access MCP server (pypi:unifi-protect-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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