The maximum length of the index

[Index(nameof(Name), IsUnique = true)]
public class Variables
{
    public int Id { get; set; }
    [Required]
    public string Name { get; set; } = string.Empty; 
    public string? Description { get; set; } = string.Empty;
    public ICollection<Translate> Translates { get; set; } = null!;
}

CREATE TABLE [Stand].[Culture.Variables] (
    [Id]          INT            IDENTITY (1, 1) NOT NULL,
    [Name]        NVARCHAR (450) NOT NULL,
    [Description] NVARCHAR (MAX) NULL,
    CONSTRAINT [PK_Culture.Variables] PRIMARY KEY CLUSTERED ([Id] ASC)
);

GO
CREATE UNIQUE NONCLUSTERED INDEX [IX_Culture.Variables_Name]
    ON [Stand].[Culture.Variables]([Name] ASC);

[Name]        NVARCHAR (450) NOT NULL,