TRAIT - Summoned
A creature called by a conjuration spell or effect gains the summoned trait. A summoned creature can't summon other creatures, create things of value, or cast spells that require a cost. It has the minion trait. If it tries to Cast A Spell of equal or higher level than the spell that summoned it, it overpowers the summoning magic, causing the summoned creature's spell to fail and the summon spell to end. Otherwise, the summoned creature uses the standard abilities for a creature of its kind. It generally attacks your enemies to the best of its abilities. If you can communicate with it, you can attempt to command it, but the GM determines the degree to which it follows your commands. Immediately when you finish Casting The Spell, the summoned creature uses its 2 actions for that turn. Summoned creatures can be banished by various spells and effects. They are automatically banished if reduced to 0 Hit Points or if the spell that called them ends.
Source: Core Rulebook pg. 637