The line is usually whether the information helps the teammate solve the next moment or turns into a running commentary on their game.
If you see something useful, keep it short and specific. 'Check your shoulder earlier' or 'stay inside me when we lose it' is easier to use than explaining the whole situation while the match is moving.
Also choose your moments. A younger player who has just made a mistake may need support first and detail later. Ask whether they want the information rather than assuming they do.
Your experience is valuable, but you are still a teammate. That means your own performance and relationships matter as much as the advice.
If you find yourself giving the same coaching point repeatedly, that may be something to mention to the manager rather than taking responsibility for fixing it yourself. Help where you can, then let people play.
