add_notes · Scythe MCP REAPER MCP: Risk & Policy

WHAT IT DOES

What add_notes does on Scythe MCP REAPER

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

WHY IT NEEDS A POLICY

Why add_notes needs a policy

Based on the tool name 'add_notes' and the server context (REAPER DAW, MIDI generation, music composition), this tool likely adds MIDI notes to a track or item, which is a write/create operation. The empty description lowers confidence. Sibling tools like 'create_midi_item' and 'generate_bass_json' confirm a pattern of music data creation.

From the tool's definition Tool name 'add_notes' suggests creating or appending note data; description is empty and uninformative.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

add_notes Rate-limited

add_notes 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_notes": {
      "limits": [
        {
          "counter": "add_notes_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 Scythe MCP REAPER, so you can run agents against it safely.

FAQ

Questions about add_notes

What does the add_notes tool do? +

add_notes. It is categorised as a Write tool in the Scythe MCP REAPER 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_notes? +

Register the Scythe MCP REAPER MCP server in PolicyLayer and add a rule for add_notes: 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 Scythe MCP REAPER. Nothing to install.

What risk level is add_notes? +

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

Can I rate-limit add_notes? +

Yes. Add a rate_limit block to the add_notes 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_notes completely? +

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

add_notes is provided by the Scythe MCP REAPER MCP server (yura9011/scythe_mcp_reaper). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.