Deoloth's page

The Helm of Confidence. Which would compel someone handling it to put it on, but... besides huge reluctance of the character was not forced on like a normal cursed item.

Wearer's would believe that they were capable of doing anything that came up as long as they had it on, and would attempt all challenges. Once, before the party knew what it was, a character made a joke about taking on a cave full of gnolls and other beastkin barehanded.

The equipped player threw his weapon and shield down, and ran into the cave without a word. He survived thanks to a ton of focused healing by the cleric and oracle. The party held him down later and forced off the helmet... Which the Oracle promptly put on. Cue a few days of travel and they get outside of a city. A few ill-spoken comments by a party member almost had the mage attempt to fistfight a few rude soldiers leaving a town on patrol.

This leads to a great moment where 4 members of the party keep trying to remove the helm, failing their will save (DC 16 guys!) and putting it on, while the dwarven cleric stood off to the side trying to not giggle (the player then loaded up some benny hill on his phone as this was going on). Eventually, the alchemist made his will save and tossed it as hard as he could off the cliff overlooking the shore... All while two guards watched from the gate confused.

The Augment Summoning feat only works with a eidolon if it was brought into play with Summon Eidolon and not the ritual.

This tells me that summoning and ritual summoning are different.

I will also point out the last line of the Control Summoned Creature spell,

"If the summoning spell ends before this spell ends, the remaining duration of this spell is lost."

Which gives the impression that the summoning was through a spell and not the ritual which has been shown to work differently then a summon spell by the augment summoning feat.

So... I don't believe it would work. Simply on the basis that Augment Summoning is widely considered not to work with the ritual, but is through the spell, which makes me think that the compulsions that bind a summoned creature do not apply towards the eidolon.

Could be wrong though. But hey, at least they get that +4 bonus for will saves at sixth level.