play_song

Search and play a song on YouTube Music

SERVERYtm SOURCE4shil/ytm-mcp

High RISK CLASS

Category Execute

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/play-song.md

WHAT IT DOES

What play_song does on Ytm

AI agents invoke play_song to trigger actions in Ytm. 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 play_song is rated High

This tool searches for and initiates playback of a song on an external service (YouTube Music). It executes an external operation whose effects depend on the arguments provided. It is not merely reading data, but actively controlling playback on a platform, placing it in the Execute category.

From the tool's definition 'Search and play a song on YouTube Music' — triggers external playback operation on YouTube Music

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs play_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 play_song, this is the rule to start with:

play_song Rate-limited

play_song 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": {
    "play_song": {
      "limits": [
        {
          "counter": "play_song_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 Ytm, apply this rule, and every play_song call is checked against it from then on.

FAQ

Questions about play_song

What does the play_song tool do? +

Search and play a song on YouTube Music. It is categorised as a Execute tool in the Ytm MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on play_song? +

Register the Ytm MCP server in PolicyLayer and add a rule for play_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 play_song? +

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

Can I rate-limit play_song? +

Yes. Add a rate_limit block to the play_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 play_song completely? +

Set action: deny in the PolicyLayer policy for play_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 play_song? +

play_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

More on Ytm, and thousands of servers like it.

This server

All 12 Ytm tools → High-risk tools on this server →

Across the catalogue

music_play on Apple Apps MCP → All high-risk MCP tools → The MCP Attack Database →

Guides

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