reminders.delete_reminder

THE RISK

Critical Risk

Why reminders.delete_reminder needs a policy

Deletion of reminders is a destructive action that permanently removes data and cannot be undone. While the impact is scoped to a single reminder (not system-wide), the irreversibility and user data loss warrant a 'high' severity rating. Confidence is high due to explicit delete semantics in both name and description.

From the tool's definition Tool name explicitly states 'delete_reminder' and description confirms 'Delete a reminder.' This is an irreversible deletion operation.

Documented attack patterns abuse exactly the kind of access reminders.delete_reminder gives an agent:

POLICY

How to control reminders.delete_reminder

PolicyLayer is an MCP gateway — it sits between your AI agents and Nucleus Apple, and nothing reaches the server without passing your rules. This is the rule we recommend for reminders.delete_reminder:

policy.json

{
  "version": "1",
  "default": "deny",
  "hide": [
    "reminders.delete_reminder"
  ]
}

reminders.delete_reminder disappears from the agent's tool list entirely, and any attempt to call it is denied. The rest of the server keeps working.

Create a free account and register Nucleus Apple — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

RESTRICT THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

More Nucleus Apple tools

Destructive calendar.delete_event Delete a calendar event. Destructive notes.delete_note Delete a note. Write notes.save_attachment Export an attachment to a file path. Write calendar.create_event Create a calendar event. Write calendar.update_event Update an existing calendar event. Write notes.add_attachment Add attachment(s) to a note from local file paths. Write notes.create_note Create a new note. Write notes.update_note Update an existing note.

All 30 Nucleus Apple tools →

Destructive tools on other servers

Android Forensics ADB MCP Server create_full_backup 0xarchive web3_revoke_key Frida Game Hacking MCP clear_scan cPanel MCP Server clear_spam_box

Go deeper

Critical-risk tools in Nucleus Apple → Every critical-risk tool this server exposes, in one view.
All critical-risk MCP tools → Every critical-risk tool across the catalogue, and the policy pattern that contains them.
The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Blast radius → How much damage one compromised or confused agent can do — and how to bound it.
Tool call approval → Approval gates on individual tool calls: auto-allow, prompt, or deny.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about reminders.delete_reminder

What does the reminders.delete_reminder tool do? +

Delete a reminder. It is categorised as a Destructive tool in the Nucleus Apple MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.

How do I enforce a policy on reminders.delete_reminder? +

Register the Nucleus Apple MCP server in PolicyLayer and add a rule for reminders.delete_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 Nucleus Apple. Nothing to install.

What risk level is reminders.delete_reminder? +

reminders.delete_reminder is a Destructive tool with critical risk. Critical-risk tools should be blocked by default and only enabled with explicit human approval.

Can I rate-limit reminders.delete_reminder? +

Yes. Add a rate_limit block to the reminders.delete_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.delete_reminder completely? +

Set action: deny in the PolicyLayer policy for reminders.delete_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.delete_reminder? +

reminders.delete_reminder is provided by the Nucleus Apple MCP server (zish-rob-crur/nucleus-apple-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Nucleus Apple tool call.

Start from Nucleus Apple, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →