"Oh, those are completely confidential of course. Not that your language has the necessary vocabulary."

"I see." (The first part is not true. Which leaves plenty of options.)

"Is your reason for having dropped in here and now in particular also confidential?"

"Nope. I let my time machine decide. She decided to come here."

True.

She does a (basic, for the moment) scan on the presumable time machine.

"I see. Does she tend to have reasons in mind?"

"Sometimes. Doesn't usually bother to tell me."

The tree is not in fact a tree. It isn't magic either. She can't tell much else.

"I see."

Nothing relevant to implied personhood?

Whatever the TARDIS is completily unfamiliar, incredibly complex and almost impossible to make sense of.

The TARDIS might be a person. It is difficult to tell.

Interesting.

"Does she provide an itinerary?"

"No. That would be boring."

"What do you tend to do when you arrive, then?"

"Look around. Meet people. See what it'd be fun to mess with."

"I see.

Depending on what you're in the mood to mess with you might want to know that there are some people here who don't appreciate that sort of thing, and tend to come and take measures." (There are both risks and advantages to saying this, which she considers.)

"Really? Sounds exciting."

Shrug. "I suppose to each their own." (She does retain the ability and option of calling them in herself, if she decides to.)