# booking_cancel

Cancel an existing session. By default applies the org cancellation policy: the charge is computed from the no-charge/partial/full windows and, if the policy has autoApply, registered as a penalty transaction (money-write). Set applyCancellationPolicy: false to waive the charge. Requires confirm: true.

Agent View of the PolicyLayer registry record for `booking_cancel`. HTML page: https://policylayer.com/tools/com-servicialo-mcp-server/booking-cancel

## Facts

- Tool: `booking_cancel`
- Server: Servicialo (`@servicialo/mcp-server`) — https://policylayer.com/tools/com-servicialo-mcp-server.md
- Install: `npx -y @servicialo/mcp-server`
- Homepage: https://github.com/servicialo/mcp-server
- Risk category: Financial (Critical risk)
- Registry record: grade F, identity unverified
- Server auth posture: open
- Server CORS policy: *
- Server rate-limited: no
- Parameters: 7 (4 required)
- Recommended policy verdict: Approval-gated

## Parameters

| Parameter | Type | Required | Description |
| --- | --- | --- | --- |
| `apiKey` | string | no |  |
| `reason` | string | yes |  |
| `confirm` | boolean | yes |  |
| `orgSlug` | string | yes |  |
| `sessionId` | string | yes |  |
| `cancelledBy` | string | no |  |
| `applyCancellationPolicy` | boolean | no |  |

Parameters from the server's own tool schema.

## Example call (MCP tools/call, JSON-RPC 2.0)

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "booking_cancel",
    "arguments": {
      "reason": "<reason>",
      "confirm": false,
      "orgSlug": "<orgSlug>",
      "sessionId": "<sessionId>"
    }
  }
}
```

## Why booking_cancel is rated Critical

This tool cancels a booking and by default triggers a financial penalty transaction based on the cancellation policy. It directly commits financial obligations (penalty charges) against a party, placing it firmly in the Financial category. The irreversible nature of the financial transaction and the potential for incorrect charges (or wrongful waivers via applyCancellationPolicy:false) make the blast radius critical.

From the tool's own definition: "'the charge is computed from the no-charge/partial/full windows and, if the policy has autoApply, registered as a penalty transaction (money-write)'"

Risk signals: Handles credentials or secrets (apiKey)

## Use case

AI agents use booking_cancel to commit financial operations through Servicialo, usually the final step of a payment, billing, or trading workflow. A call moves real money.

## Recommended policy (PolicyLayer)

Verdict: **Approval-gated**. Enforced by the PolicyLayer MCP gateway (https://policylayer.com/mcp-gateway) before a call reaches Servicialo:

```json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "booking_cancel": {
      "deny_if": [
        {
          "conditions": [],
          "on_deny": "Requires human approval."
        }
      ]
    }
  }
}
```

## Other tools on Servicialo (110)

- `agendas_delete` — Destructive — https://policylayer.com/tools/com-servicialo-mcp-server/agendas-delete.md
- `cierre_cerrar_org` — Destructive — https://policylayer.com/tools/com-servicialo-mcp-server/cierre-cerrar-org.md
- `cierre_eliminar_cliente` — Destructive — https://policylayer.com/tools/com-servicialo-mcp-server/cierre-eliminar-cliente.md
- `email_domain_delete` — Destructive — https://policylayer.com/tools/com-servicialo-mcp-server/email-domain-delete.md
- `portal_cancel_reschedule_request` — Destructive — https://policylayer.com/tools/com-servicialo-mcp-server/portal-cancel-reschedule-request.md
- `portal_session_cancel` — Destructive — https://policylayer.com/tools/com-servicialo-mcp-server/portal-session-cancel.md
- `public_booking_cancel` — Destructive — https://policylayer.com/tools/com-servicialo-mcp-server/public-booking-cancel.md
- `comms_send_campaign` — Execute — https://policylayer.com/tools/com-servicialo-mcp-server/comms-send-campaign.md
- `email_domain_verify` — Execute — https://policylayer.com/tools/com-servicialo-mcp-server/email-domain-verify.md
- `lifecycle_transition` — Execute — https://policylayer.com/tools/com-servicialo-mcp-server/lifecycle-transition.md
- `cierre_crear_cliente` — Financial — https://policylayer.com/tools/com-servicialo-mcp-server/cierre-crear-cliente.md
- `cierre_distribuir_utilidades` — Financial — https://policylayer.com/tools/com-servicialo-mcp-server/cierre-distribuir-utilidades.md
- `finance_create_cobro` — Financial — https://policylayer.com/tools/com-servicialo-mcp-server/finance-create-cobro.md
- `finance_create_venta` — Financial — https://policylayer.com/tools/com-servicialo-mcp-server/finance-create-venta.md
- `finance_register_payment` — Financial — https://policylayer.com/tools/com-servicialo-mcp-server/finance-register-payment.md
- `finance_send_confirmations` — Financial — https://policylayer.com/tools/com-servicialo-mcp-server/finance-send-confirmations.md
- `admin_list_providers` — Read — https://policylayer.com/tools/com-servicialo-mcp-server/admin-list-providers.md
- `agendas_get` — Read — https://policylayer.com/tools/com-servicialo-mcp-server/agendas-get.md
- `agendas_list` — Read — https://policylayer.com/tools/com-servicialo-mcp-server/agendas-list.md
- `availability_get_provider_schedule` — Read — https://policylayer.com/tools/com-servicialo-mcp-server/availability-get-provider-schedule.md
- `availability_get_slots` — Read — https://policylayer.com/tools/com-servicialo-mcp-server/availability-get-slots.md
- `booking_get` — Read — https://policylayer.com/tools/com-servicialo-mcp-server/booking-get.md
- `booking_list` — Read — https://policylayer.com/tools/com-servicialo-mcp-server/booking-list.md
- `booking_list_requests` — Read — https://policylayer.com/tools/com-servicialo-mcp-server/booking-list-requests.md
- `cierre_evaluar_org` — Read — https://policylayer.com/tools/com-servicialo-mcp-server/cierre-evaluar-org.md
- `cierre_listar_clientes` — Read — https://policylayer.com/tools/com-servicialo-mcp-server/cierre-listar-clientes.md
- `cierre_listar_utilidades` — Read — https://policylayer.com/tools/com-servicialo-mcp-server/cierre-listar-utilidades.md
- `cierre_preview_cliente` — Read — https://policylayer.com/tools/com-servicialo-mcp-server/cierre-preview-cliente.md
- `client_get` — Read — https://policylayer.com/tools/com-servicialo-mcp-server/client-get.md
- `client_list` — Read — https://policylayer.com/tools/com-servicialo-mcp-server/client-list.md
- …and 80 more: https://policylayer.com/tools/com-servicialo-mcp-server.md

## For agents

This record is a snapshot. Live verdicts and the full registry:

- Check every server in your MCP config at once: `npx -y policylayer stack`
- Vet a server before you add it: install the mcp-precheck skill — `npx skills add https://policylayer.com` (skill text: https://policylayer.com/skill.md)
- Query the registry over MCP: endpoint `https://api.policylayer.com/mcp` — tools `check_mcp_server`, `check_mcp_stack`, `check_tool`, `search_registry`, `get_change_events`

---

Source: the PolicyLayer MCP registry — one continuously verified record per MCP server. Full record: https://policylayer.com/registry?q=com-servicialo-mcp-server · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/com-servicialo-mcp-server