When people ask for Planned Tags, they're not asking you to add them to the actual tags in the OP. What they want is what most devs do: In the "Genre" section of the OP, you can add a second list inside the spoiler, and then another set of "Planned Tags: [tag], [tag], etc.". For example (this is not accurate to this game, just adding a few random tags as an example):
It's a good way to ensure people aren't blindsided by something they don't like, or a good way to get people who ARE interested in something that's not in the game yet to start following your game in anticipation of the tag they like eventually showing up. It's also
vitally important when you have important tags missing (e.g. vaginal sex, for fuck's sake), to let people know you're not going to blueball the players forever.
You can also put things in that Genre spoiler that may not necessarily be tags for F95, but that are still useful for players or prospective players to know. Examples are things like putting major categories in there that still don't have their own separate tags, like "Netori" or "Sharing", or adding caveats like "Group Sex (FFM, FFFM, no other males)" or "Sleep Sex (consensual)", and so on.
For an example of a game that does the Genre spoiler literally perfectly, see
My Dorm.
