## Update a list

`client.Rules.Lists.Update(ctx, listID, params) (*ListUpdateResponse, error)`

**put** `/accounts/{account_id}/rules/lists/{list_id}`

Updates the description of a list.

### Parameters

- `listID string`

  The unique ID of the list.

- `params ListUpdateParams`

  - `AccountID param.Field[string]`

    Path param: The Account ID for this resource.

  - `Description param.Field[string]`

    Body param: An informative summary of the list.

### Returns

- `type ListUpdateResponse struct{…}`

  - `ID string`

    The unique ID of the list.

  - `CreatedOn string`

    The RFC 3339 timestamp of when the list was created.

  - `Kind ListUpdateResponseKind`

    The type of the list. Each type supports specific list items (IP addresses, ASNs, hostnames or redirects).

    - `const ListUpdateResponseKindIP ListUpdateResponseKind = "ip"`

    - `const ListUpdateResponseKindRedirect ListUpdateResponseKind = "redirect"`

    - `const ListUpdateResponseKindHostname ListUpdateResponseKind = "hostname"`

    - `const ListUpdateResponseKindASN ListUpdateResponseKind = "asn"`

  - `ModifiedOn string`

    The RFC 3339 timestamp of when the list was last modified.

  - `Name string`

    An informative name for the list. Use this name in filter and rule expressions.

  - `NumItems float64`

    The number of items in the list.

  - `NumReferencingFilters float64`

    The number of [filters](/api/resources/filters/) referencing the list.

  - `Description string`

    An informative summary of the list.

### Example

```go
package main

import (
  "context"
  "fmt"

  "github.com/cloudflare/cloudflare-go"
  "github.com/cloudflare/cloudflare-go/option"
  "github.com/cloudflare/cloudflare-go/rules"
)

func main() {
  client := cloudflare.NewClient(
    option.WithAPIToken("Sn3lZJTBX6kkg7OdcBUAxOO963GEIyGQqnFTOFYY"),
  )
  list, err := client.Rules.Lists.Update(
    context.TODO(),
    "2c0fc9fa937b11eaa1b71c4d701ab86e",
    rules.ListUpdateParams{
      AccountID: cloudflare.F("023e105f4ecef8ad9ca31a8372d0c353"),
    },
  )
  if err != nil {
    panic(err.Error())
  }
  fmt.Printf("%+v\n", list.ID)
}
```

#### Response

```json
{
  "errors": [
    {
      "code": 1000,
      "message": "message",
      "documentation_url": "documentation_url",
      "source": {
        "pointer": "pointer"
      }
    }
  ],
  "messages": [
    {
      "code": 1000,
      "message": "message",
      "documentation_url": "documentation_url",
      "source": {
        "pointer": "pointer"
      }
    }
  ],
  "result": {
    "id": "2c0fc9fa937b11eaa1b71c4d701ab86e",
    "created_on": "2020-01-01T08:00:00Z",
    "kind": "ip",
    "modified_on": "2020-01-10T14:00:00Z",
    "name": "list1",
    "num_items": 10,
    "num_referencing_filters": 2,
    "description": "This is a note"
  },
  "success": true
}
```