Add rate limiting for pagination

**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 mentions pagination, validation, and error handling but names no files, tests, or entry points. First reconcile the title with the body and locate the validation path; done should include a defined rate-limiting behavior and more descriptive errors, with tests covering the agreed cases.

Written by the indexing model from the issue text.