List all appointments for a given user
AI agents call ListAppointments to retrieve information from MCP Appointment Booking Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool queries and returns appointment data without creating, modifying, or deleting records. It is a pure read operation that retrieves existing information, which poses minimal risk if invoked by an AI agent. The severity is low as the operation is non-destructive and limited to data retrieval.
From the tool's definition Tool name 'ListAppointments' and description 'List all appointments for a given user' indicate a retrieval operation with no modification or side effects.
Attacks that exploit this kind of access
List all appointments for a given user. It is categorised as a Read tool in the MCP Appointment Booking Server MCP Server, which means it retrieves data without modifying state.
Register the MCP Appointment Booking Server MCP server in PolicyLayer and add a rule for ListAppointments: 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 Appointment Booking Server. Nothing to install.
ListAppointments 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 ListAppointments 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 ListAppointments. 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.
ListAppointments is provided by the MCP Appointment Booking Server MCP server (manish-awase/mcp-appointment-booking-server). 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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