Medium Risk

sonos_add_device

Manually add a Sonos device by IP address. Use when SSDP discovery fails due to network restrictions or firewall rules. Device must be network-accessible on port 1400.

How to control sonos_add_device ↓

What sonos_add_device does on Sonos Ts

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

Medium Risk

Why sonos_add_device needs a policy

This tool creates or registers a new device in the system state, which is a reversible Write operation (the device can be removed). It does not execute arbitrary commands, delete data, or move money. The blast radius is medium because misconfiguration could disrupt audio service discovery or add unauthorized devices to the network, but the operation itself is non-destructive and reversible.

From the tool's definition 'Manually add a Sonos device by IP address' — creates a new device entry in the system's device registry, modifying the stored configuration of managed Sonos devices.

Documented attack patterns abuse exactly the kind of access sonos_add_device gives an agent:

How to control sonos_add_device

PolicyLayer is an MCP gateway — it sits between your AI agents and Sonos Ts, and nothing reaches the server without passing your rules. This is the rule we recommend for sonos_add_device:

policy.json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "sonos_add_device": {
      "limits": [
        {
          "counter": "sonos_add_device_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

sonos_add_device 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.

  1. Create a free account and register Sonos Ts — nothing to install.
  2. Add this policy — paste it, or build it visually.
  3. Point your MCP client (Claude, Cursor, anything) at your gateway URL.
LIMIT THIS TOOL →

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Related tools and policies

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Questions about sonos_add_device

What does the sonos_add_device tool do? +

Manually add a Sonos device by IP address. Use when SSDP discovery fails due to network restrictions or firewall rules. Device must be network-accessible on port 1400. It is categorised as a Write tool in the Sonos Ts MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on sonos_add_device? +

Register the Sonos Ts MCP server in PolicyLayer and add a rule for sonos_add_device: 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 Sonos Ts. Nothing to install.

What risk level is sonos_add_device? +

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

Can I rate-limit sonos_add_device? +

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

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

sonos_add_device is provided by the Sonos Ts MCP server (tommertom/sonos-ts-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Sonos Ts tool call.

Start from Sonos Ts, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

Free to start. No card required.

60 Sonos Ts tools catalogued and risk-classified — across an index of 43,000+ MCP servers.

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