If a summoner finds himself in a locked prison plane, where planar travel is blocked, can he summon monsters or his eidolon?
The description for the conjuration school of spells says that the summoning subschool of spells bring a 'manifestation' of summoned monsters to you; whereas the calling subschool of spells transport a creature from another plane to your plane. Does this mean that monsters summoned via summon monster aren't transported across planes to you? Can a monster summoned via summon monster be dismissed? Can a creature summoned via summon nature's ally be dismissed?
Called creatures are fundamentally different from summoned creatures in that they die when killed rather than disappear and reform. Also, called creatures cannot be dispelled like summoned creatures.
The description of the summoner's eidolon says that it is to be treated as a summoned creature, but it also says when an eidolon dies it goes back to its home plane. This description seems to imply that summoned monsters travel across planes when they die too, is this true? Can a summoned monster be dismissed?
A locked prison plane is a bit like the spell dimensional lock. The description for dimensional lock says it doesn't prevent summoned monsters from disappearing at the end of the spell. Does this imply that monsters can be summoned via summon monster into an area under the effects of dimensional lock? Does this imply that summoned monsters don't use planar travel to manifest themselves?
In the end, does a locked prison plane almost completely lock-down the summoner?