Agents, Creatures, and Whose Site To Use

[Bandobras Took]

Agents may tap to play creatures based on the site type of the agent's current site.

1) For purposes of determining what creatures are playable, do I use the version from my site deck or my opponent's?

1) Are these creatures considered keyed to anything?

As a hypothetical example, my agent Wormtongue is at Hero Isengard when my FW opponent is moving to the Wizardhaven Isengard.

I tap Wormtongue to make creatures playable.

1) Is the site for this purpose considered to be a Ruins & Lairs or a Haven? If the latter, then it would seem that no creatures are enabled (no tapping to make creatures playable at a Haven).

2) Are these creatures considered keyed to Isengard?

There is also a third question, which is

3) Can I target a site that a face-up agent is currently at with my own hazards?

My apologies if these have been answered before, but I'm trying to wrap my mind around this ability and see where it goes.

[Konrad Klar]

1) Are these creatures considered keyed to anything?

• You may play Men, Dwarves, Elves, Dúnedain, and Hobbits at Free-Holds.
• You may play Orcs, Nazgûl, Men, Dwarves, Elves, Dúnedain, and Hobbits at
Border-Holds.
• You may play [...]

A creature "played at" a site is the same as being "keyed to" the site.

3) Can I target a site that a face-up agent is currently at with my own hazards?

Hazards may only be played on a company whose movement/hazard phase is being resolved, or on the site they are moving to.

and

A non-moving company's current site is considered its new site for card play.

[Konrad Klar]

1) For purposes of determining what creatures are playable, do I use the version from my site deck or my opponent's?

Because:

Hazards may only be played on a company whose movement/hazard phase is being resolved, or on the site they are moving to.

I think company's new site is used for purposes of determining what creatures are playable.

In case:

As a hypothetical example, my agent Wormtongue is at Hero Isengard when my FW opponent is moving to the Wizardhaven Isengard.

Isengard is not "the same Ruins & Lairs, Shadow-hold, or Dark-hold" so creatures cannot be made playable in this fasion.