Aggravate — ruling 1

Aggravate targets only the player. Creatures with hexproof that player controls will be dealt damage by Aggravate if it resolves.

Aggravate — ruling 2

The controller of a creature dealt damage by Aggravate still decides which player or planeswalker the creature attacks.

Aggravate — ruling 3

If, during a player’s declare attackers step, a creature is tapped, is affected by a spell or ability that says it can’t attack, or hasn’t been under that player’s control continuously since the turn began (and doesn’t have haste), then it doesn’t attack. If there’s a cost associated with having a creature attack, the player isn’t forced to pay that cost, so it doesn’t have to attack in that case either.

Aggravate : règles, fonctionnement et interactions (MTG)

Aggravate is one of those cards players keep asking about. Here is, in plain words, what its official text says, the rulings published by Wizards of the Coast, and the combos players actually run.

Official card text

Aggravate deals 1 damage to each creature target player controls. Each creature dealt damage this way attacks this turn if able.

How it works : Aggravate

Original English text — Wizards of the Coast / Scryfall

#1May 1, 2012· Wizards of the Coast
Aggravate targets only the player. Creatures with hexproof that player controls will be dealt damage by Aggravate if it resolves.
No other card is named in this ruling.
#2May 1, 2012· Wizards of the Coast
The controller of a creature dealt damage by Aggravate still decides which player or planeswalker the creature attacks.
No other card is named in this ruling.
#3May 1, 2012· Wizards of the Coast
If, during a player’s declare attackers step, a creature is tapped, is affected by a spell or ability that says it can’t attack, or hasn’t been under that player’s control continuously since the turn began (and doesn’t have haste), then it doesn’t attack. If there’s a cost associated with having a creature attack, the player isn’t forced to pay that cost, so it doesn’t have to attack in that case either.
No other card is named in this ruling.