It is important to have balanced recommendations. You don't want them to be too strict and get in the way of creativity, but at the same time, you don't want them to be too loose and useless.
The brand identity book should be a collaborative product of the team. Managers, designers, and copywriters should be equally involved. If a company has a branding department, that's great. But the project needs to be coordinated by someone who helps shape the brand's personality, who has the power to make decisions and impose on them.
All brand guidance is meaningless if employees don't know or respect it.
It should become the norm for new hires to be informed about the brand and asked to read the brand book. We can control the entire process of creating a brand book from A to Z and implement the philosophy of leadership in your company.