notes_create_note · Mcp Mac MCP: Risk & Policy

WHAT IT DOES

What notes_create_note does on Mcp Mac

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

WHY IT NEEDS A POLICY

Why notes_create_note needs a policy

This tool creates new notes, which is a reversible write operation. It adds data to the Notes application without destructive effects, side effects on other systems, financial implications, or code execution. The blast radius is minimal—a note can be easily deleted or modified by the user.

From the tool's definition Tool name 'notes_create_note' and description 'Create new note with title and content' indicate data creation.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

notes_create_note Rate-limited

notes_create_note 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_create_note": {
      "limits": [
        {
          "counter": "notes_create_note_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 Mcp Mac, so you can run agents against it safely.

FAQ

Questions about notes_create_note

What does the notes_create_note tool do? +

Create new note with title and content. It is categorised as a Write tool in the Mcp Mac 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_create_note? +

Register the Mcp Mac MCP server in PolicyLayer and add a rule for notes_create_note: 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 Mcp Mac. Nothing to install.

What risk level is notes_create_note? +

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

Can I rate-limit notes_create_note? +

Yes. Add a rate_limit block to the notes_create_note 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_create_note completely? +

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

notes_create_note is provided by the Mcp Mac MCP server (samicokar/mcp-mac). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.