Update core documentation

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

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

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

Start by locating the helpers and their current error-handling paths in the repository; the issue names no file or test. Done means the relevant errors provide more descriptive, detailed messages and the core documentation is updated to reflect the behavior.

Written by the indexing model from the issue text.