fw_add_to_playlist

Append tracks to an existing playlist. track_ids are integer Funkwhale track IDs (from fw_search type=

SERVERCrow SOURCEkh0pper/crow

Medium RISK CLASS

Category Write

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-add-to-playlist.md

WHAT IT DOES

What fw_add_to_playlist does on Crow

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

RISK

Why fw_add_to_playlist is rated Medium

This tool modifies a playlist by adding (appending) tracks to it. This is a reversible write operation that creates or modifies data state. The severity is medium because unauthorized playlist modifications could constitute unwanted data alterations, but the impact is scoped to a single user's playlist and is easily reversible (tracks can be removed).

From the tool's definition Append tracks to an existing playlist

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs fw_add_to_playlist 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_add_to_playlist, this is the rule to start with:

fw_add_to_playlist Rate-limited

fw_add_to_playlist 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": {
    "fw_add_to_playlist": {
      "limits": [
        {
          "counter": "fw_add_to_playlist_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 Crow, apply this rule, and every fw_add_to_playlist call is checked against it from then on.

FAQ

Questions about fw_add_to_playlist

What does the fw_add_to_playlist tool do? +

Append tracks to an existing playlist. track_ids are integer Funkwhale track IDs (from fw_search type=. It is categorised as a Write tool in the Crow MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on fw_add_to_playlist? +

Register the Crow MCP server in PolicyLayer and add a rule for fw_add_to_playlist: 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_add_to_playlist? +

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

Can I rate-limit fw_add_to_playlist? +

Yes. Add a rate_limit block to the fw_add_to_playlist 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_add_to_playlist completely? +

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

fw_add_to_playlist 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.

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