AI agents call cal_get_booking to retrieve information from Access without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves booking details from Cal.com without altering state. However, severity is elevated to 'medium' (not 'low') because the exposed data includes sensitive information: attendee identities, meeting notes, responses, and meeting links.
From the tool's definition Tool name 'cal_get_booking' and description 'Retrieve full details of a single Cal.com booking including attendees, notes, responses, and meeting link' indicate data retrieval with no modification.
Attacks that exploit this kind of access
Retrieve full details of a single Cal.com booking including attendees, notes, responses, and meeting link. Use after cal_list_bookings to get complete info on a specific booking. It is categorised as a Read tool in the Access MCP Server, which means it retrieves data without modifying state.
Register the Access MCP server in PolicyLayer and add a rule for cal_get_booking: 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 Access. Nothing to install.
cal_get_booking 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 cal_get_booking 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 cal_get_booking. 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.
cal_get_booking is provided by the Access MCP server (scottpedia0/access). 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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