Delete an event
AI agents call delete_event to permanently remove resources in Calendar Mcp — typically in cleanup and lifecycle workflows. It does its job in a single call, and there is no undo.
Deleting a calendar event is an irreversible action that cannot be undone. Once deleted, the event is permanently removed from the user's calendar. This fits the Destructive category definition: 'irreversibly deletes or overwrites data, or actions that cannot be undone.' The severity is high because a mistaken deletion by an AI agent could remove important appointments, meetings, or time blocks that the user depends…
From the tool's definition Tool name is 'delete_event' with description 'Delete an event'. The server documentation explicitly mentions 'CRUD operations' including event management on Google Calendar.
Attacks that exploit this kind of access
Delete an event. It is categorised as a Destructive tool in the Calendar Mcp MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.
Register the Calendar MCP server in PolicyLayer and add a rule for 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 Calendar Mcp. Nothing to install.
delete_event is a Destructive tool with critical risk. Critical-risk tools should be blocked by default and only enabled with explicit human approval.
Yes. Add a rate_limit block to the 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.
Set action: deny in the PolicyLayer policy for 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.
delete_event is provided by the Calendar MCP server (ydrogen/calendar-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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