In considering the content of contracts, it seems that some of them overlap significantly with each other.
- Trade Secret Agreement, Confidential Information Agreement
The Trade Secret Agreement is different from the Confidential Information one, because for example trade secrets can last indefinitely while confidential info might only last a few years. But often times I've seen it where there was just one document, such as "IP Confidentiality Agreement" which covered both trade secrets and confidential information cases, just with an extra clause here and there. So in the end we have 1 agreement instead of the 2+ agreements.
In both these cases, I'm not sure why you wouldn't just merge them into one document each. I'd be interested to know the reasoning behind why they are kept separate. Maybe because it has something to do with how well they will work in court, because having them separate keeps them single-purpose focused and so they have a clear boundary or something. Or perhaps keeping them separate is just arbitrary legacy thing. Or maybe, keeping them separate, you can argue that it's easier for the person signing or reading them to grasp them (but, you could also argue the reverse). I am not sure in any case and would be interested to know why it's done this way.