set_port_on · AC Infinity MCP: Risk & Policy

WHAT IT DOES

What set_port_on does on AC Infinity MCP

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

WHY IT NEEDS A POLICY

Why set_port_on needs a policy

The tool changes the state of a port (likely enabling/disabling power to connected devices like fans or humidifiers), which is a Write-category action—it creates or modifies system state. While reversible (can be turned off again with set_port_off), incorrect use could disrupt climate control in a growing environment.

From the tool's definition Tool name 'set_port_on' indicates a state-changing action on physical ports controlled by AC Infinity devices (fan controllers).

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

set_port_on Rate-limited

set_port_on 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": {
    "set_port_on": {
      "limits": [
        {
          "counter": "set_port_on_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 AC Infinity MCP, so you can run agents against it safely.

FAQ

Questions about set_port_on

What does the set_port_on tool do? +

set_port_on. It is categorised as a Write tool in the AC Infinity 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 set_port_on? +

Register the AC Infinity MCP server in PolicyLayer and add a rule for set_port_on: 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 AC Infinity MCP. Nothing to install.

What risk level is set_port_on? +

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

Can I rate-limit set_port_on? +

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

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

set_port_on is provided by the AC Infinity MCP server (ober37/ac-infinity-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.