Get parsed details of a specific event. PREREQUISITE: You must first call list_calendars, then list_events to get the eventUrl. Returns structured event data (title, start, end, location, description) instead of raw iCalendar format.
AI agents call get_event_details to retrieve information from Fastmail Calendar MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
get_event_details retrieves and queries calendar event information with no side effects. It requires prerequisites (list_calendars, list_events) to obtain an eventUrl, then returns parsed structured data. This is a pure read operation with minimal risk—even if misused by an AI agent, it only exposes existing calendar data without altering, deleting, or executing actions.
From the tool's definition Tool performs data retrieval only: 'Get parsed details of a specific event' and 'Returns structured event data' with no modification, creation, or deletion capabilities.
Attacks that exploit this kind of access
Get parsed details of a specific event. PREREQUISITE: You must first call list_calendars, then list_events to get the eventUrl. Returns structured event data (title, start, end, location, description) instead of raw iCalendar format. It is categorised as a Read tool in the Fastmail Calendar MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Fastmail Calendar MCP Server MCP server in PolicyLayer and add a rule for get_event_details: 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 Fastmail Calendar MCP Server. Nothing to install.
get_event_details 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 get_event_details 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 get_event_details. 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.
get_event_details is provided by the Fastmail Calendar MCP Server MCP server (nova-3951/fastmail-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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