Search for events by keyword across all calendars. Searches event title, location, and description.
AI agents call search_events to retrieve information from Apple Calendar MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The tool retrieves and filters existing calendar event data based on search criteria. This is a classic Read operation: it accesses information (event title, location, description) without creating, modifying, or deleting anything. Severity is low because a compromised search function poses minimal risk—an attacker gains visibility into calendar data but cannot alter or cause other harm through this tool alone.
From the tool's definition Tool name is 'search_events' and description states it 'Search[es] for events by keyword across all calendars.' This is a query/retrieval operation with no side effects—it does not modify, delete, or execute operations on the calendar data.
Attacks that exploit this kind of access
Search for events by keyword across all calendars. Searches event title, location, and description. It is categorised as a Read tool in the Apple Calendar MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Apple Calendar MCP Server MCP server in PolicyLayer and add a rule for search_events: 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 Apple Calendar MCP Server. Nothing to install.
search_events is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the search_events 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 search_events. 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.
search_events is provided by the Apple Calendar MCP Server MCP server (null-phnix/apple-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.
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