Cancel an appointment. When to Use This Tool Use this tool when the user explicitly wants to cancel an appointment. This action should be performed only after confirming the correct appointment with the user. Because this is a destructive write operation, intent must be clear and unambiguous. A...
Part of the Eka EMR MCP server. Enforce policies on this tool with Intercept, the open-source MCP proxy.
AI agents may call cancel_appointment to permanently remove or destroy resources in Eka EMR. Without a policy, an autonomous agent could delete critical data in a loop with no way to undo the damage. Intercept blocks destructive tools by default and requires explicit human approval before enabling them.
Without a policy, an AI agent could call cancel_appointment in a loop, permanently destroying resources in Eka EMR. There is no undo for destructive operations. Intercept blocks this tool by default and only allows it when a human explicitly approves the action.
Destructive tools permanently remove data. Block by default. Only enable with explicit approval workflows.
tools:
cancel_appointment:
rules:
- action: deny
reason: "Blocked by default — enable with approval"See the full Eka EMR policy for all 17 tools.
Agents calling destructive-class tools like cancel_appointment have been implicated in these attack patterns. Read the full case and prevention policy for each:
Other tools in the Destructive risk category across the catalogue. The same policy patterns (deny, require_approval) apply to each.
cancel_appointment is one of the critical-risk operations in Eka EMR. For the full severity-focused view — only the critical-risk tools with their recommended policies — see the breakdown for this server, or browse all critical-risk tools across every MCP server.
Cancel an appointment. When to Use This Tool Use this tool when the user explicitly wants to cancel an appointment. This action should be performed only after confirming the correct appointment with the user. Because this is a destructive write operation, intent must be clear and unambiguous. Args: appointment_id: Appointment's unique identifier cancel_data: Cancellation details including reason and notes Returns: Cancellation confirmation with updated appointment status. It is categorised as a Destructive tool in the Eka EMR MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.
Add a rule in your Intercept YAML policy under the tools section for cancel_appointment. You can allow, deny, rate-limit, or validate arguments. Then run Intercept as a proxy in front of the Eka EMR MCP server.
cancel_appointment is a Destructive tool with critical risk. Critical-risk tools should be blocked by default and only enabled with explicit human approval.
Yes. Add a rate_limit block to the cancel_appointment rule in your Intercept 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 Intercept policy for cancel_appointment. 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.
cancel_appointment is provided by the Eka EMR MCP server (eka-care/emr). Intercept sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Open source. One binary. Zero dependencies.
npx -y @policylayer/intercept