You can use custom tags in Jsdoc2md, for example @bread, @milk, @fulfil, @reject - whatever you like. Custom tags will be rendered as-written in the source comments. There is no standard way to document promises, this is one way to do it using custom tags.

1. Use @fulfil and @reject tags:

     /**
    * Returns something.
    *
    * @returns {Promise}
    * @fulfil {string} - The data you wanted.
    * @reject {Error} - The error `name` property will be one of the following:
    *
    * - `NO_THANKS`: Computer doesn't want to.
    * - `TOO_MUCH`: Too much work, get some other app to do it.
    */
    function getSomething () {}
   

2. Produces output like this:

Returns something.

Kind: global function Fulfil: string - The data you wanted. Reject: Error - The error name property will be one of the following:

NO_THANKS: Computer doesn't want to. TOO_MUCH: Too much work, get some other app to do it.