Improve error messages in hooks

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

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

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

The issue does not name files, tests, or a specific hook. Start by locating hook validation and its current error handling, then identify the existing test entry points for that path. Done means validation failures provide more descriptive, debugging-oriented messages and the relevant behavior is covered by tests.

Written by the indexing model from the issue text.