People who give away friends’ numbers to their other friends who are strangers without seeking permission are insensible; perhaps, you can consider it as betrayal of trust.
If you have a relative or friend who works as insurance agent, who proclaim themselves as “financial planner”, do not assume your friends want entertainments from him.
How would you feel if you receive calls from those agents out of nowhere? It is sick to waste even ten seconds of life finding out the motive of the irritating caller.
Do not do what you do not want others to do to you.
My elder brother is a financial planner as well and I do not give any friend’s number to him.