This utility spell calls your rift entity to you, if you have one summoned and it’s not present. There isn’t much to be said about it, except that air and magic entities don’t generally need to be beckoned after using many navigation spells.
The in game help reads:
No saving throw. Casting time: 6 rounds. Type of spell: neutral spell. Affecting stats: wis. Cast type: rift. Spell point cost: 163. Commands your rift entity travel to your current location.