delete_calendar
AI agents call delete_calendar to permanently remove resources in MCP Apple Reminders — typically in cleanup and lifecycle workflows. It does its job in a single call, and there is no undo.
Deleting a calendar is an irreversible operation that destroys data and cannot be undone. Even though the description is absent, the tool name 'delete_calendar' combined with the server's documented support for 'delete' operations and presence of other bulk deletion tools on the server makes this clearly a Destructive category tool. The high severity reflects potential loss of user reminders and associated data.
From the tool's definition Tool name is 'delete_calendar' paired with server context describing 'delete' operations on reminders and lists. Server explicitly mentions 'delete' capability, and sibling tool 'bulk_delete_completed' reinforces that this server includes deletion operations.
Attacks that exploit this kind of access
delete_calendar. It is categorised as a Destructive tool in the MCP Apple Reminders MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.
Register the MCP Apple Reminders MCP server in PolicyLayer and add a rule for delete_calendar: 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.
delete_calendar 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_calendar 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_calendar. 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_calendar 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.
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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