DH reread CH 30

[dumbledore11214]

No: HPFGUIDX 187470

Carol:
<SNIP>
I think that the *wand* understands the will of the spellcaster, much as the
Room of Requirement does, and makes the victim do whatever the spellcaster wants
him to do, whether that's to force a Goblin take him to a vault in Gringotts and
run his fingernail down the door to open it (shiver!) or hide (Travers) or lie
down like a good boy so he can be tied up. <SNIP>

Alla:

Right, based on how Imperio is used in DH (and I still cannot check on GoF) this was my thought too. The reason I asked was I was not sure if this is the way Imperio worked in GoF and it just feels wierd to me that this particular spell works this way without caster needing to specify what she or he wants. I mean some spells already ask for something specific, but say Accio! requires you to name the object you want, right?

And if wand understands the will of the speaker, why can't they just say Accio and wand figures out what caster wants?