set_urgent · MCP Apple Reminders MCP: Risk & Policy

WHAT IT DOES

What set_urgent does on MCP Apple Reminders

AI agents use set_urgent 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_urgent needs a policy

The tool name 'set_urgent' indicates modification of a reminder's priority or status attribute. On a reminders management server that explicitly supports 'update' operations, this is a reversible Write operation—it changes reminder metadata but does not create or delete data. Severity is medium because incorrect urgency flags could cause missed deadlines or notification spam, but the effect is easily reversible.

From the tool's definition Tool name 'set_urgent' on a reminders server with 'update' capabilities listed in server description. Empty tool description prevents higher confidence classification.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

set_urgent Rate-limited

set_urgent 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_urgent": {
      "limits": [
        {
          "counter": "set_urgent_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_urgent

What does the set_urgent tool do? +

set_urgent. 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_urgent? +

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

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

Can I rate-limit set_urgent? +

Yes. Add a rate_limit block to the set_urgent 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_urgent completely? +

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

set_urgent 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.