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# Book time off

> Request leave for yourself or, as a manager or admin, for someone else. Input schema, a tools/call example and an example result.

Source: https://cotlet.dev/docs/mcp/timetastic/book_time_off

Docs sections: [Get started](https://cotlet.dev/docs.md) · [REST API](https://cotlet.dev/docs/api.md) · [MCP](https://cotlet.dev/docs/mcp.md) · [SDKs & CLI](https://cotlet.dev/docs/sdks.md) · [Integrations](https://cotlet.dev/docs/integrations.md)

Request leave for yourself or, as a manager or admin, for someone else.

Timetastic MCP tools: https://cotlet.dev/docs/mcp/timetastic.md

MCP tool: `timetastic_write → book_time_off`

Access: write. Confirm: waits for the user's OK before it runs.

Returns the request id, the days booked, the status and the approver. When a department limit blocks an employee booking for themselves, the call returns Timetastic's message and books nothing. The approver gets an email. By default you confirm each call; you can switch that off for this tool.

## Parameters

| Name | Type | Required | Description |
|---|---|---|---|
| `who_for` | string | yes | Full name of the person the leave is for, as in the Who for field. |
| `from_date` | string | yes | First day, YYYY-MM-DD. |
| `to_date` | string | yes | Last day, YYYY-MM-DD. |
| `leave_type` | string | yes | Leave type as the Type drop-down lists it, for example Holiday or Sick leave. |
| `reason` | string | no | Optional reason the approver reads. |
| `confirm_override` | boolean | no | Manager or admin only: book anyway when Timetastic shows a staffing warning. Defaults to false. |

## tools/call

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "timetastic_write",
    "arguments": {
      "operation": "book_time_off",
      "arguments": {
        "who_for": "Ana Torres",
        "from_date": "2026-12-21",
        "to_date": "2026-12-24",
        "leave_type": "Holiday",
        "reason": "Christmas week"
      }
    }
  }
}
```

## Example response

```json
{
  "content": [
    {
      "type": "text",
      "text": "{ ... same JSON as structuredContent ... }"
    }
  ],
  "structuredContent": {
    "request_id": "5129012",
    "employee": "Ana Torres",
    "leave_type": "Holiday",
    "from": "2026-12-21",
    "to": "2026-12-24",
    "days": 4,
    "status": "Pending",
    "approver": "Priya Nair",
    "warning": null
  },
  "isError": false
}
```

Previous: [Get the annual allowance summary](https://cotlet.dev/docs/mcp/timetastic/get_annual_summary.md)
Next: [Approve a leave request](https://cotlet.dev/docs/mcp/timetastic/approve_request.md)

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## For AI agents: sign your user up

Is your user asking you to sign them up for Cotlet? You can do it for them, no account or key needed.

1. Read the fields and their allowed values: GET https://cotlet.dev/api/v1/access-requests
2. Ask the user for each value: email, apps, what you will do with them. If they leave the password to you, generate a strong one and show it to them.
3. Show the user what you will send, then POST it as JSON to https://cotlet.dev/api/v1/access-requests.

One call creates the account and sends the access request; we email the user when access is granted.