spotify_skip · Kef MCP: Risk & Policy

WHAT IT DOES

What spotify_skip does on Kef

AI agents invoke spotify_skip to trigger actions in Kef. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call — builds kicked off, notifications sent, workflows started.

WHY IT NEEDS A POLICY

Why spotify_skip needs a policy

This tool sends a command to Spotify to skip the current track, which is an external operation with a side effect (changing playback state). It doesn't merely read data, nor does it write/create content, destroy data, or involve finances. It falls under Execute as it triggers an external action whose effect depends on current playback context.

From the tool's definition 'Skip to the next Spotify track' — triggers an external playback operation on Spotify

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

spotify_skip Rate-limited

spotify_skip stays usable, but rate-capped — a runaway agent can't fire it dozens of times a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "spotify_skip": {
      "limits": [
        {
          "counter": "spotify_skip_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

RATE-LIMIT THIS TOOL →

Instant setup, no code required.

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

FAQ

Questions about spotify_skip

What does the spotify_skip tool do? +

Skip to the next Spotify track. It is categorised as a Execute tool in the Kef MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on spotify_skip? +

Register the Kef MCP server in PolicyLayer and add a rule for spotify_skip: 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 Kef. Nothing to install.

What risk level is spotify_skip? +

spotify_skip is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.

Can I rate-limit spotify_skip? +

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

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

spotify_skip is provided by the Kef MCP server (nqrwhal/kef-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.