notes_write · Superskills MCP: Risk & Policy

WHAT IT DOES

What notes_write does on Superskills

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

WHY IT NEEDS A POLICY

Why notes_write needs a policy

This tool creates or modifies Markdown files reversibly. While 'overwrite' suggests data loss of previous note content, the operation is fundamentally reversible (notes can be rewritten again). It does not irreversibly delete or destroy data (which would be Destructive), nor does it execute arbitrary code or shell commands (which would be Execute).

From the tool's definition Tool description states 'Write or overwrite a Markdown note'—'write' and 'overwrite' are reversible modification operations on files. The use of 'overwrite' indicates data replacement capability.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

notes_write Rate-limited

notes_write 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": {
    "notes_write": {
      "limits": [
        {
          "counter": "notes_write_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 Superskills, so you can run agents against it safely.

FAQ

Questions about notes_write

What does the notes_write tool do? +

Write or overwrite a Markdown note at the given relative path inside \. It is categorised as a Write tool in the Superskills MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on notes_write? +

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

What risk level is notes_write? +

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

Can I rate-limit notes_write? +

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

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

notes_write is provided by the Superskills MCP server (lee2026-dev/superskills-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.