Just in case someone with the same problem faces this question; the best solution I’ve currently found is the use of the @type doc tag instead, so you would write something like:
/**
* @param word - Word used as the greeting
* @return {void}
* @type {(word : string) => void}
*/
function sayHiThere( word ){ console.log(word); }
When refactoring the signature, this at least does not provide the types to the function parameters, while it shows the types of the function when you start typing the function’s name to call it (so when you start typing sayH, a dialogue like this shows up: function(string):mixed, but the data types do not show up when you provide the parameters themselves.