Simply don't add them as STATUS ATTRIBUTES to your Game Player Objects (such as the default "player" object) or nor to your Game Object too.
Add Status Attributes -> causes them to be displayed on the right pane (called "status") when playing the game. So, do NOT do this, if you don't want them to be seen by the game player~user when they're playing your game.
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Add Attribute -> creates the attribute for that object (but it remains hidden during game play)
Add Attribute and Add Status Attribute -> creates the attribute for the object and also displays it during game play
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you can also display attributes as a message too (instead of via the right pane), simply via the:
Add a~new script -> script -> print a message -> change it to [EXPRESSION]-> msg (object_name.attribute_name)
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for example, I could create a command (this is going to be in code... hopefully it will at least make sense to you somewhat):
// Note: you do have to create~add the attributes onto your "player" Game Player Object too
<command name="show_stats_command">
<pattern>stats</pattern> // this (stats) is what you type in during game play to activate the command
<script>
msg (player.hp)
msg (player.mp)
msg (player.strength)
(etc etc etc)
</script>
</command>