Optimize types for large datasets

**Problem**
When working with handlers, 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 handlers mentioned in the issue and reviewing their current error messages. Determine which failures need more descriptive messages, then verify that the updated messages improve debugging and maintenance without changing the underlying behavior.

Written by the indexing model from the issue text.