time to summon tanar'ri?

[Kershek]

How long does it take for a demon to summon a Tanar'ri? One full round? Does that provoke an AoO?

 

[Lord Pendragon]

From the SRD:

Summon Tanar’ri (Sp): Tanar’ri can summon other tanar’ri much as though casting a summon monster spell, but they have only a limited chance of success. Roll d%: On a failure, no tanar’ri answer the summons. Summoned creatures automatically return whence they came after 1 hour. A tanar’ri that has just been summoned cannot use its own summon ability for 1 hour.

So it works like a summon monster spell, which is 1 full round, and does provoke AoOs.

 

[gfunk]

It was my understanding that all spell-like abilities take a standard action to use unless otherwise specified. And it does provoke AoO. (Source, Monster Manual, p. 8 upper left corner)