Add rate limiting for caching

**Problem**
When working with controllers, 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 controller and caching implementation, then determine where rate limiting and the requested error messages belong. Done should include an agreed scope, implemented behavior, and tests covering the limits and error handling.

Written by the indexing model from the issue text.