reminders_create_reminder · Mcp Mac MCP: Risk & Policy

WHAT IT DOES

What reminders_create_reminder does on Mcp Mac

AI agents use reminders_create_reminder 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 reminders_create_reminder needs a policy

This tool creates a new reminder, which is a reversible write operation. It adds data to the user's Reminders app without deleting, executing arbitrary code, moving money, or causing irreversible harm. The worst-case misuse would be creating unwanted reminders, which is easily undone by the user. Severity is low due to minimal blast radius and reversibility.

From the tool's definition Tool name 'reminders_create_reminder' and description 'Create new reminder with title, optional due date and list' explicitly indicate creation of new data in the Reminders application.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

reminders_create_reminder Rate-limited

reminders_create_reminder 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": {
    "reminders_create_reminder": {
      "limits": [
        {
          "counter": "reminders_create_reminder_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 reminders_create_reminder

What does the reminders_create_reminder tool do? +

Create new reminder with title, optional due date and list. 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 reminders_create_reminder? +

Register the Mcp Mac MCP server in PolicyLayer and add a rule for reminders_create_reminder: 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 reminders_create_reminder? +

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

Can I rate-limit reminders_create_reminder? +

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

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

reminders_create_reminder 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.