export_png_pages · Musescore MCP: Risk & Policy

WHAT IT DOES

What export_png_pages does on Musescore

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

WHY IT NEEDS A POLICY

Why export_png_pages needs a policy

Exporting/generating image files from MuseScore scores is a Write operation—it creates new data artifacts (PNG image files) in the system. While the operation is reversible (exported files can be deleted), it modifies the file system by introducing new files. This is less severe than Destructive actions but constitutes data creation.

From the tool's definition Tool name 'export_png_pages' indicates generation/export of image files from MuseScore documents. The server description confirms it supports format conversion and export operations. No description provided for this specific tool, reducing confidence slightly.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

export_png_pages Rate-limited

export_png_pages 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": {
    "export_png_pages": {
      "limits": [
        {
          "counter": "export_png_pages_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 Musescore, so you can run agents against it safely.

FAQ

Questions about export_png_pages

What does the export_png_pages tool do? +

export_png_pages. It is categorised as a Write tool in the Musescore MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on export_png_pages? +

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

What risk level is export_png_pages? +

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

Can I rate-limit export_png_pages? +

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

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

export_png_pages is provided by the Musescore MCP server (strongbeen04/musescore-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.