add_song_to_list · Bandmate MCP Server MCP: Risk & Policy

WHAT IT DOES

What add_song_to_list does on Bandmate MCP Server

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

WHY IT NEEDS A POLICY

Why add_song_to_list needs a policy

The tool creates a new association between a song and a list, which is a reversible write operation. It does not delete data (would be Destructive), execute arbitrary code (would be Execute), move money (would be Financial), or merely retrieve data (would be Read). The 'requires authentication' note confirms it modifies user-owned data.

From the tool's definition Tool name 'add_song_to_list' and description 'Add a song to an existing list' indicates a create/modify operation that adds a song to a playlist. This is a reversible modification of list membership.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

add_song_to_list Rate-limited

add_song_to_list 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": {
    "add_song_to_list": {
      "limits": [
        {
          "counter": "add_song_to_list_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

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

FAQ

Questions about add_song_to_list

What does the add_song_to_list tool do? +

Add a song to an existing list. Requires authentication. It is categorised as a Write tool in the Bandmate MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on add_song_to_list? +

Register the Bandmate MCP Server MCP server in PolicyLayer and add a rule for add_song_to_list: 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 Bandmate MCP Server. Nothing to install.

What risk level is add_song_to_list? +

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

Can I rate-limit add_song_to_list? +

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

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

add_song_to_list is provided by the Bandmate MCP Server MCP server (jnicolasgomez/bandmate-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.