Optimize types for large datasets

**Problem**
When working with services, 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 names no files, tests, or entry points. Start by locating the affected service error-handling paths and clarifying which messages need more detail; done means the requested errors are more descriptive and the relevant behavior is verified.

Written by the indexing model from the issue text.