caldav_delete_event

THE RISK

Critical Risk

Why caldav_delete_event needs a policy

This tool permanently removes calendar events without a documented undo mechanism. Deletion of calendar events is irreversible and can disrupt schedules, meetings, and commitments. While the blast radius is scoped to individual calendar events (not system-wide), accidental or malicious deletion of important events constitutes significant harm.

From the tool's definition Tool name: caldav_delete_event; Description: 'Delete an event by its UID'. The word 'Delete' explicitly indicates irreversible removal of data.

Documented attack patterns abuse exactly the kind of access caldav_delete_event gives an agent:

POLICY

How to control caldav_delete_event

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

policy.json

{
  "version": "1",
  "default": "deny",
  "hide": [
    "caldav_delete_event"
  ]
}

caldav_delete_event 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 CalDAV MCP Server — 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 CalDAV MCP Server tools

Write caldav_create_event Create a new event in the calendar Read caldav_get_event_by_uid Get a specific event by its UID Read caldav_get_events Get events from calendar for a specified period Read caldav_get_today_events Get all events for today Read caldav_get_week_events Get all events for the week Read caldav_list_calendars List all available calendars Read caldav_search_events Search events by text, attendees, or location

All 8 CalDAV MCP Server tools →

Destructive tools on other servers

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Go deeper

Critical-risk tools in CalDAV MCP Server → 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 caldav_delete_event

What does the caldav_delete_event tool do? +

Delete an event by its UID. It is categorised as a Destructive tool in the CalDAV MCP Server 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 caldav_delete_event? +

Register the CalDAV MCP Server MCP server in PolicyLayer and add a rule for caldav_delete_event: 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 CalDAV MCP Server. Nothing to install.

What risk level is caldav_delete_event? +

caldav_delete_event 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 caldav_delete_event? +

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

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

caldav_delete_event is provided by the CalDAV MCP Server MCP server (madbonez/caldav-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every CalDAV MCP Server tool call.

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

CHECK YOUR STACK →