Long customized description in macro

Hi,

I'm developing my own macro in Dataiku and I just want to write a custom description (see picture : custom_description_macro.png).

I can't find in the documentation the field to specify in the runnable.json file to do this.

I only find the "description" field in the "meta" field, like this:

"meta": {
        // label: name of the runnable as displayed, should be short
        "label": "Normalisation des variables",

        // description: longer string to help end users understand what this runnable does
        "description": "Basic description of the macro",
        
        // icon: must be one of the FontAwesome 3.2.1 icons, complete list here at https://fontawesome.com/v3.2.1/icons/
        "icon": "icon-rocket"
    },

When I do this, I can obtain a description but it's not the description I want to show to the users when they execute the macro .

I also found the custom settings user interface, but I think there is an easier way to do it that I miss.

Thanks in advance,

Thomas

Operating system used: Windows