download_song

Download a song by YouTube Music URL

SERVERYtm SOURCE4shil/ytm-mcp

Medium RISK CLASS

Category Write

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade B, identity unverified Pull the record →

This record as markdown: /tools/4shil-ytm-mcp/download-song.md

WHAT IT DOES

What download_song does on Ytm

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

RISK

Why download_song is rated Medium

Downloading a song writes a file to the local filesystem. It is reversible (the file can be deleted), so it falls under Write rather than Destructive. The blast radius is medium because an AI agent could download large numbers of files, consume disk space, or potentially download copyrighted material without authorization.

From the tool's definition Download a song by YouTube Music URL

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs download_song safely

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

download_song Rate-limited

download_song 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": {
    "download_song": {
      "limits": [
        {
          "counter": "download_song_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL → Instant setup, no code required.

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

FAQ

Questions about download_song

What does the download_song tool do? +

Download a song by YouTube Music URL. It is categorised as a Write tool in the Ytm MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on download_song? +

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

What risk level is download_song? +

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

Can I rate-limit download_song? +

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

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

download_song is provided by the Ytm MCP server (4shil/ytm-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

KEEP EXPLORING

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Guides

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