Correct, it is just tolerated heavily

No, it's not allowed through a city ordinance. It's still entirely illegal in all of the Netherlands.

They just have a stance that they don't take action in most cases that are inside specific guidelines, which includes the open sale of weed in certain shops.

If they wanted to arrest you for something that under gedogen is usually permitted, they still could.

City ordinances exist here and in the Netherlands too, the difference is that a city ordinance makes something explicitly legal while in the area it covers, while in gedogen, the thing stays entirely illegal, the cops just will overlook most all cases unless it's something like Minaj did where she's hauling around a quantity larger than you would for personal use and trying to bring it across borders.

If I go from Belgium to the Netherlands, I can smoke it up at a dutch coffeeshop all day long and even carry around a small quantity, it's illegal, but cops won't do anything about it.

The moment I go from the Netherlands back to Belgium, I could get in trouble if I still have that weed with me.

And that's within the EU, with open borders and free movement of EU citizens.

The UK however no longer is part of the EU, so they are even more strict about taking drugs across borders with them.

It's not a city ordinance at all but it is however quite complicated and lots of "grey areas", the stuff is basically illegal up until the point it magically appears in the coffeeshop, and then it's illegal over 5g. In any case traveling with it internationally is a big no-no even if it's between two destinations where it's legal. This is all very silly of course, hopefully with Germany going legal we're finally gonna start seeing some progress on the topic, if daddy Germany is ok with it the rest will likely follow.

The issue isn't the weed, it's the quantity.

They won't do anything for 5 grams which is obvious for personal use.

She was purportedly caught with 30+ grams in her luggage.

And weed is not legal in the Netherlands. It's under "gedogen" which means the sale and use at point of sale which are very specific types of shops and growing a quantity for personal use" and carrying on you a quantity for personal use (5 grams) are officially overlooked, while still illegal.

Carrying around quantities that are more than would be for personal use while not being a permitted point of sale is still something you can get arrested for.

This story is an anecdote. As the person below says, it was the quantity that was at issue here.