bulk_move · MCP Apple Reminders MCP: Risk & Policy

WHAT IT DOES

What bulk_move does on MCP Apple Reminders

AI agents use bulk_move 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 bulk_move needs a policy

This tool modifies the state of reminders by relocating them to a different calendar, which is a write operation. It is reversible (reminders can be moved back), so it does not qualify as Destructive. The blast radius is medium because bulk operations on multiple reminders could cause unintended reorganization of a user's task management system, but the change is not permanent and can be undone.

From the tool's definition Tool performs 'Move each reminder in `reminder_ids` to `calendar_id`' — a reversible modification of reminder organization/location.

Risk signalsBulk/mass operation — affects multiple targets

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

bulk_move Rate-limited

bulk_move 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": {
    "bulk_move": {
      "limits": [
        {
          "counter": "bulk_move_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 bulk_move

What does the bulk_move tool do? +

Move each reminder in reminder_ids to calendar_id. 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 bulk_move? +

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

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

Can I rate-limit bulk_move? +

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

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

bulk_move 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.