Does "swap A for B" imply a direction?

In a lot of examples, commutivity is obvious:

• The two computers can easily swap data.
• We swapped houses during the children's school vacation.
• Do you want to swap places?
• If you prefer to sit next to Chris, I'll swap seats with you.
• When you've finished reading your book, and I've finished mine, can we swap?
• We swapped addresses with the people we met on vacation.
• We spent the evening swapping (= telling each other) stories/jokes.

But one non-commutative sense (swap [A] for [B] = replace [what you have] with [something else]) may be the default as in this specifying definition (though admittedlyin the examples given, it is contextually forced)

swap someting for something: to exchange something you have [or in hypothetical situations would see yourselves having] for something else:

• Most consumers said they wouldn't swap the product [they owned / desired] for a cheaper own-label brand.
• They've swapped their old car for a much larger one.
• When he got a job in a bank, he had to swap his jeans and T-shirt for a suit (= he had to wear formal clothes instead of informal ones).
• [ + two objects ] I'll swap you my chocolate bar for your peanuts.

(All quotes so far from Cambridge Dictionary, re-ordered.)

But as I expected, counterexamples (swap [A] for [B] = replace with [something else] [what you have]) aren't hard to find on the internet:

• "I'll swap you your pasta salad, for this apple", my friend would tell me.
• I'll swap your flat mate for mine ..."

ie 'I'll / I would exchange something else for something I have.'

So 'I'll swap A for B' does not entail that it is A or B that you have. You have (perhaps hypothetically) one of them. Directionality (who is the donor of the first mentioned article / state ... and who the recipient) must be indicated by context, though A is more usually owned by the speaker.