fw_next_track

Skip to the next track in the album queue on the glasses. If no tracks remain, playback stops.

SERVERCrow SOURCEkh0pper/crow

High RISK CLASS

Category Execute

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/kh0pper-crow/fw-next-track.md

WHAT IT DOES

What fw_next_track does on Crow

AI agents invoke fw_next_track to trigger actions in Crow. 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.

RISK

Why fw_next_track is rated High

This tool triggers an external operation (media playback control) on a hardware device (glasses). It changes the playback state of an external device, which qualifies as Execute — it doesn't merely read data, but actively controls hardware behavior. The blast radius is medium as misuse could disrupt ongoing media playback but has no data or financial consequences.

From the tool's definition Skip to the next track in the album queue on the glasses. If no tracks remain, playback stops.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs fw_next_track safely

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

fw_next_track Rate-limited

fw_next_track 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": {
    "fw_next_track": {
      "limits": [
        {
          "counter": "fw_next_track_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

RATE-LIMIT THIS TOOL → Instant setup, no code required.

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

FAQ

Questions about fw_next_track

What does the fw_next_track tool do? +

Skip to the next track in the album queue on the glasses. If no tracks remain, playback stops. It is categorised as a Execute tool in the Crow MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on fw_next_track? +

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

What risk level is fw_next_track? +

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

Can I rate-limit fw_next_track? +

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

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

fw_next_track is provided by the Crow MCP server (kh0pper/crow). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

KEEP EXPLORING

More on Crow, and thousands of servers like it.

This server

All 587 Crow tools → High-risk tools on this server →

Across the catalogue

All high-risk MCP tools → The MCP Attack Database →

Guides

Govern code and CI agents →Agent sandbox →Least privilege for MCP →