How do agent interactions work?

[dannyfc]

I didn't play FM 22 so unsure if this is a new feature or was introduced last year.

When asking an agent about a player's availability- you're given the option to express your level of interest. Based on that level of interest, the agent will reveal the player's contract demands at which point you can either Agree, Contest, or Stall. 

1) What are the implications of expressing the highest level of interest? It reveals the most information, so what's drawback or alternatively the incentive to express less interest?

2) Depending on the 'Agree/Context/Stall' response, what is the consequence for any subsequent contract negotiation screen?

Thanks