set_list_pinned · MCP Apple Reminders MCP: Risk & Policy

WHAT IT DOES

What set_list_pinned does on MCP Apple Reminders

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

WHY IT NEEDS A POLICY

Why set_list_pinned needs a policy

This tool reversibly modifies a list property (pinned status) without deleting data or creating financial obligations. It is a Write operation. Severity is low because pinning/unpinning a list has minimal blast radius—it affects only UI state or list organization, not reminder content or critical data.

From the tool's definition Tool name 'set_list_pinned' suggests modifying a list's pinned state (a metadata property). No description provided. Server enables 'create, read, update, delete' operations on reminders and lists.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

set_list_pinned Rate-limited

set_list_pinned 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": {
    "set_list_pinned": {
      "limits": [
        {
          "counter": "set_list_pinned_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 Apple Reminders, so you can run agents against it safely.

FAQ

Questions about set_list_pinned

What does the set_list_pinned tool do? +

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

How do I enforce a policy on set_list_pinned? +

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

What risk level is set_list_pinned? +

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

Can I rate-limit set_list_pinned? +

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

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

set_list_pinned is provided by the MCP Apple Reminders MCP server (rex/mcp-apple-reminders). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.