What tells you if a person is trustworthy or not?

When they do what they say they are gonna do.
When they show up to meet me on time .
When they are gonna be late or can't make it , they say so.

Observing how they treat others

I feel you are asking in curiosity, philosophically, but if they were to ask this question too much I wouldn't trust them (you). If they never asked me to trust them, I'm not sure if I could trust without either. Any time I have trusted, it's been based upon my intuition, and even though I have things I want to trust upon, it's been broken before and without explaining in turn I learned I trusted them more.

Firstly trusting arises only if there is going to be some relationship or business with that person. If I need to trust, then I will observe how they present themselves and how they respect values, their choice of words and whether they are trying to act trustworthy to achieve something. Then I will test their patience by asking more questions or posing what if situations to see how they respond. Those untrustworthy shall respond impatiently or act as if they are the best. And some go on the defence by saying how they don't trust others.

Sometimes you can't know at first meeting. There are psychopaths who can charm anyone initially. As you get to know them, warning signs include: excessive bragging, hate speech, overly rude, aggressive talk or behavior, love of violence or love of talking about violence, pushy or controlling behavior -- including people who try to force you into accepting help (always beware of this one).

You can’t know on first meeting. You can’t know until time passes, and you see how trustworthy they are in different scenarios. Trust must be earned, not freely given. Only a fool would trust someone they don’t know well.

What kind of stuff usually takes time. But sometimes you can get a feeling about somebody by just the way they carry themselves. And the way they talk.

Nothing. I don't trust people.

If they can't keep their word or have a history of stealing from people etc

Trust them with something small and see how they handle it. Work your way up from there

If I feel secure around them, heard, respected and a general feeling of balance, not excess things, like praise or criticism or gossip.
If they either open too much or share nothing, that's also not someone I'd trust.

Time and lots of time

How they react to my animals
White lies or lack white lies in day to day interactions. which include exaggerations
Do they talk crap about others in front of me.
Their question to answer ratio (if no or low questions red flag)

@Renkon 🤔no certainly not i would never trust a stranger on the first time i meet them.i need to get too know them first and see how they tick first never go on first appearances i say .

They shouldn't Yawn even once.
🥱

Look for them shifty eyes

Their actions vs their words. Do they align?

It takes me time.

I drop 5$

Trick question. There is no such person.

Your gut feelings

I don't find it possible the first time of meeting. You need to know them really well and know their character.