Use DescribeVault with an AWS SDK or CLI

    /// <summary>
    /// Describe an Amazon S3 Glacier vault.
    /// </summary>
    /// <param name="vaultName">The name of the vault to describe.</param>
    /// <returns>The Amazon Resource Name (ARN) of the vault.</returns>
    public async Task<string> DescribeVaultAsync(string vaultName)
    {
        var request = new DescribeVaultRequest
        {
            AccountId = "-",
            VaultName = vaultName,
        };

        var response = await _glacierService.DescribeVaultAsync(request);

        // Display the information about the vault.
        Console.WriteLine($"{response.VaultName}\tARN: {response.VaultARN}");
        Console.WriteLine($"Created on: {response.CreationDate}\tNumber of Archives: {response.NumberOfArchives}\tSize (in bytes): {response.SizeInBytes}");
        if (response.LastInventoryDate != DateTime.MinValue)
        {
            Console.WriteLine($"Last inventory: {response.LastInventoryDate}");
        }

        return response.VaultARN;
    }

The following command retrieves data about a vault named my-vault:

aws glacier describe-vault --vault-name my-vault --account-id -

Amazon Glacier requires an account ID argument when performing operations, but you can use a hyphen to specify the in-use account.