manage_plugin_interfaces · HC3 MCP Server MCP: Risk & Policy

WHAT IT DOES

What manage_plugin_interfaces does on HC3 MCP Server

AI agents use manage_plugin_interfaces to create or update resources in HC3 MCP Server — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your HC3 MCP Server environment.

WHY IT NEEDS A POLICY

Why manage_plugin_interfaces needs a policy

This tool modifies device configuration by adding or removing interfaces, which qualifies as a Write operation. It is reversible (interfaces can be added back), distinguishing it from Destructive. However, the blast radius is medium rather than low because improper interface management could compromise device functionality or expose unintended capabilities.

From the tool's definition Tool description states 'Add or remove interfaces from a device' - these are reversible modification operations on device configuration within the Fibaro Home Center 3 system.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

manage_plugin_interfaces Rate-limited

manage_plugin_interfaces 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": {
    "manage_plugin_interfaces": {
      "limits": [
        {
          "counter": "manage_plugin_interfaces_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 HC3 MCP Server, so you can run agents against it safely.

FAQ

Questions about manage_plugin_interfaces

What does the manage_plugin_interfaces tool do? +

Add or remove interfaces from a device. It is categorised as a Write tool in the HC3 MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on manage_plugin_interfaces? +

Register the HC3 MCP Server MCP server in PolicyLayer and add a rule for manage_plugin_interfaces: 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 HC3 MCP Server. Nothing to install.

What risk level is manage_plugin_interfaces? +

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

Can I rate-limit manage_plugin_interfaces? +

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

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

manage_plugin_interfaces is provided by the HC3 MCP Server MCP server (jangabrielsson/hc3_mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.