Gleaning strategist

By using a bonus action (and rolling a d6) or using an action (and choosing one option from 1-5), you can learn information about your foe and possibly offer aid to your companions in battle against this creature. If you use this feat with a bonus action, you roll 1d6 and ascertain the mentioned information (at your DM's discretion). If you use this  feat with an action you can choose one option (1-5). You can only use this feat once per short rest.

1.  You gain information about the creature's HP and AC
2. You know a creature's objective in battle and their most used attack
3. You learn one of the creature's's immunities and one of it's highest saving throw bonus
4. You learn one of the creature's weakness and one of its weakest savinng throw bonus
5. You ascertain a weak point of the creature, giving your allies advantage with attacks against it on the next turn
6. You can choose out of option 1-5 and you gain an additional use of this feat

Additional note: This feat can be changed at your DM's discretion, since this cannot be applicable for every game style