AI agents call calendar_get_upcoming_events to retrieve information from Mcp Mac without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves calendar events within a specified date range. It queries existing data from the macOS Calendar application without creating, modifying, or deleting any events. Read operations on calendar data pose minimal security risk—the information retrieved is typically user-owned and already accessible to the user through normal calendar interfaces.
From the tool's definition Tool name 'calendar_get_upcoming_events' and description 'Get upcoming events in date range' indicate data retrieval without modification. The verb 'get' and absence of any language suggesting creation, modification, or deletion confirm read-only operation.
Attacks that exploit this kind of access
Get upcoming events in date range. It is categorised as a Read tool in the Mcp Mac MCP Server, which means it retrieves data without modifying state.
Register the Mcp Mac MCP server in PolicyLayer and add a rule for calendar_get_upcoming_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 Mcp Mac. Nothing to install.
calendar_get_upcoming_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 calendar_get_upcoming_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 calendar_get_upcoming_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.
calendar_get_upcoming_events is provided by the Mcp Mac MCP server (samicokar/mcp-mac). 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.
Teams ship this data inside their own products. See what a licence covers →