Is it possible to restrict JsonConverter registered on a property to only run during model binding?

I have a Web API application that serves an endpoint: POST: /api/Partition and accepts a JSON object with the following structure:

{
    // myProperty is a string array
    myProperty: [ "a", "b" ]
}

However, the corresponding WebAPI controller action accepts a class with the following structure:

[HttpPost]
public ActionResult<MyClass> Post(MyClass postObject)
{
    ...
}

public class MyClass 
{
    public string MyProperty { get; set;}
}

I needed to convert MyProperty from a string[] to a string. Therefore I wrote this custom JsonConverter and registered it to MyProperty.

public class StringToStringArrayJsonConverter : JsonConverter<string>
{
    public override string? Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)
    {
        if (reader.TokenType == JsonTokenType.StartArray)
        {
            List<string> list = new List<string>();
            reader.Read();
            while (reader.TokenType != JsonTokenType.EndArray)
            {
                list.Add(JsonSerializer.Deserialize<string>(ref reader, options)!);
                reader.Read();
            }
            return string.Join(",", list);
        }
        return reader.GetString();
    }

    public override void Write(Utf8JsonWriter writer, string value, JsonSerializerOptions options)
    {
        writer.WriteStartArray();
        writer.WriteStringValue(value);
        writer.WriteEndArray();
    }

    public override bool CanConvert(Type typeToConvert)
    {
        return true;
    }
}

// Register JsonConverter on MyProperty
public class MyClass 
{
    [JsonConverter(typeof(StringToStringArrayJsonConverter))]
    public string MyProperty { get; set;}
}

However, I would like this JsonConverter to only take effect during model binding before the controller action runs. Right now, it is also used whenever I use
JsonSerializer.Serialize() and JsonSerializer.Deserialize(), and I don’t want that to happen. How do I override the registered JsonConverter whenever I want to use the JsonSerializer?