Update utils documentation

**Problem**
When working with models, the error messages could be more descriptive.

**Suggestion**
Improve error handling and add detailed error messages.

**Context**
This would help with debugging and maintenance.

No file, test, or entry point is identified. Start by locating the utils documentation and model-related error handling, then determine which messages need more detail. Done should include an agreed scope for the error changes and tests or documentation updates that demonstrate the improved guidance.

Written by the indexing model from the issue text.