categorize_grocery_items · MCP Apple Reminders MCP

WHAT IT DOES

What categorize_grocery_items does on MCP Apple Reminders

AI agents use categorize_grocery_items 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 categorize_grocery_items needs a policy

Without a description, I infer this tool categorizes (organizes/modifies) grocery items within the reminders system, which is a Write operation since it reverses categorizations. The empty description significantly reduces confidence. If the tool only reads/displays categorization without modification, it would be Read; if it deletes, it would be Destructive.

From the tool's definition The tool name 'categorize_grocery_items' suggests modifying or organizing reminder data. The server description explicitly states it enables 'create, read, update, delete, search, and organization of reminders and lists.' However, the tool description is…

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

categorize_grocery_items Rate-limited

categorize_grocery_items 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": {
    "categorize_grocery_items": {
      "limits": [
        {
          "counter": "categorize_grocery_items_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 categorize_grocery_items

What does the categorize_grocery_items tool do? +

categorize_grocery_items. 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 categorize_grocery_items? +

Register the MCP Apple Reminders MCP server in PolicyLayer and add a rule for categorize_grocery_items: 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 categorize_grocery_items? +

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

Can I rate-limit categorize_grocery_items? +

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

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

categorize_grocery_items 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.