Is there a script to clear InDesign metadata (redundancy) or the clipboard, just like Photoshop?

Photoshop has such a script, is there an ID?

Photoshop files can have a problem with excess ancestor metadata, which can be cleared via Javascript. Ancestor metadata can find its way into an InDesign layout, and if that is your problem the ID document’s file size would be unusually large. 

You could try this script, which opens placed Photoshop files, clears ancestor metadata, updates the links, and does a save as. Make sure you have a reliable backup of the ID file and its assets before running the script.

/*
* Clear ancestor metadata from document images
* Version 1.0
* Rob Day 2020-2021
*/

#target indesign
#targetengine "session" 

var doc = app.documents.item(0);
var fp = doc.filePath;
var lnks = removeDuplicates(doc.links.everyItem().name)

var lPaths = [];

for (var i = 0; i < lnks.length; i++){
    var l = doc.links.itemByName(lnks[i])
    if (l.parent.constructor.name == "Image" && l.status != 1819109747) {
        lPaths.push(l.filePath)
    } 
};   

//Send the array of file paths to Photoshop
runPhotoshop(lPaths);


/**
* Update the ID links after Photoshop saves 
*  void 
* 
*/
function upDate(){
    var lks = doc.links;
    
    for (var i = 0; i < lks.length; i++){
        //$.writeln(lks[i].name + " Uppdate")
        while (lks[i].status != LinkStatus.NORMAL) {
            lks[i].update();
        }
    }
    doc.save (File(fp + "/" + doc.name))
}


/**
* Opens Photoshop via Bridgetalk and run psScript() function
*  the array of file paths to open 
*  value void
* 
*/
function runPhotoshop(a){
    var bt = new BridgeTalk();  
    bt.target = "photoshop";  
    bt.body = "var a = "+a.toSource()+";"  
    bt.body += psScript.toString() + "psScript();";

    bt.onResult = function(resObj) {
        upDate()
    }  

    bt.onError = function( inBT ) { alert(inBT.body); };  
    bt.send(8);  
      
    function psScript() {  
        for (var i = 0; i < a.length; i++){
        var d = open(File(a[i]));
        //https://community.adobe.com/t5/indesign/file-size-is-too-big/td-p/9370587/page/2
        if (ExternalObject.AdobeXMPScript == undefined) ExternalObject.AdobeXMPScript = new ExternalObject("lib:AdobeXMPScript");   
            var xmp = new XMPMeta( activeDocument.xmpMetadata.rawData);   
            xmp.deleteProperty(XMPConst.NS_PHOTOSHOP, "DocumentAncestors");   
            d.xmpMetadata.rawData = xmp.serialize(); 
            d.save();
            //$.writeln(d.name + " Saved")
            d.close();
        }; 
    }  
}


/**
* Removes duplicates from the array
*  an array to edit 
*  an array with no duplicates 
* https://community.adobe.com/t5/indesign/js-how-to-remove-duplicate-items-from-an-array/td-p/3044978
*/

function removeDuplicates(a){
    var ra = new Array();
    var o = new Object()
    for( i=0 ; i<a.length ; ++i ){
        o[a[i]] = null;
    }
    for( a[i] in o ){
        ra.push(a[i]);
    }
    return ra;
}

Hi,

I am not sure, but you can try to turn off the setting in Clipboard Handling.

Please see screenshot.