const dataSets = await client.datasets.update([{id: 123, update: {description: {set: 'New description'}}}]);

{
  "items": [
    {
      "writeProtected": false,
      "id": 4503599627370496,
      "createdTime": 1730204346000,
      "lastUpdatedTime": 1730204346000,
      "externalId": "my.known.id",
      "name": "<string>",
      "description": "<string>",
      "metadata": {}
    }
  ]
}