Nothing to hide

Honesty

Sincerity

Truthfulness

Fairness

And frankness

Candid

Be careful what you wish for

And be careful how you curse

Deceit

Falsehood

Ulterior motives

Lies

No matter how white

Are not in my nature

Honest

I am forthright

I am truthful

I am candid

I am honest

I am sincere

I harbor no secrets

I have nothing to hide

I am an open book

Believe me

I am black and white

In a world meant for gray

No room for half truths

Only truths whole

No second guessing

No uncertainty

Binary

I do not twist words

I am full

I am honest

I am not misleading

I take the intent of your words

I do not misinterpret

I take your words

And speak truth

Riddle free

But you see

How it binds me

How I must measure myself

Both movements and thought

Words are the least of it

I cannot pass the wrong message

Nor imply a tell

Nor hesitate

Nor think twice

You can be honest without speaking truth

Lucky you

If I second guess

I question

Be unsure

Every moment is but

A half truth

[Context: due to magical means, the narrator cannot lie, but that is more complicated in context]