A client should have parameters he likes to see a fund manager roughly adhere to, however, they should not be cast iron, died in wool absolutes... to do so would definately put the manager under unnecessary stress, leading to mistakes most likely.
In my experience a trader does best when he has zero (or near to it) emotional involvement in his trading. Placing STRICT limits on the trader DOES increase the traders emotional involvement.
Trade parameters should be a 2 way street between the client and manager (trader).
Wait for the trade to come to you... be patient.