Add rate limiting for caching

**Problem**
When working with config, 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 any files, tests, or entry points, and its title conflicts with the body. Start by locating the configuration, caching, and error-handling code in the repository and clarify whether the intended work is rate limiting or more descriptive errors. Done criteria are not defined until that scope is resolved.

Written by the indexing model from the issue text.