notes_create · Apple Notes MCP: Risk & Policy

WHAT IT DOES

What notes_create does on Apple Notes MCP

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

WHY IT NEEDS A POLICY

Why notes_create needs a policy

This tool creates new persistent data (Apple Notes) in a user's note system. While creation is reversible via the notes_delete sibling tool, the primary action is Write—it modifies the user's note corpus. Severity is medium because misuse could create spam, misleading notes, or clutter a user's workspace, but the impact is limited to note creation without financial harm, code execution, or data destruction.

From the tool's definition Tool description explicitly states 'Create a new Apple Note' and accepts parameters for folder target and HTML body content, establishing irreversible data creation capability.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

notes_create Rate-limited

notes_create 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": {
      "limits": [
        {
          "counter": "notes_create_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 Apple Notes MCP, so you can run agents against it safely.

FAQ

Questions about notes_create

What does the notes_create tool do? +

Create a new Apple Note in a target folder. bodyHtml should be valid lightweight HTML such as div, p, ul, ol, li, h1-h3. It is categorised as a Write tool in the Apple Notes MCP 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? +

Register the Apple Notes MCP server in PolicyLayer and add a rule for notes_create: 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 Apple Notes MCP. Nothing to install.

What risk level is notes_create? +

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

Can I rate-limit notes_create? +

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

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

notes_create is provided by the Apple Notes MCP server (taylorarndt/apple-notes-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.