Update parsers 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.

Begin by locating the parsers documentation and the model-related error handling referenced in the issue. Confirm whether done means clearer documentation, improved error messages, or both, then verify that the parser guidance and messages are more descriptive.

Written by the indexing model from the issue text.