Update services documentation

**Problem**
When working with routes, the error messages could be more descriptive.

**Suggestion**
Improve error handling and add detailed error messages.

**Context**
This would help with debugging and maintenance.

No file, test, or route entry point is named. Start by locating the services documentation and the route error-handling entry points, then determine which error details are required. The issue provides no specific acceptance criteria for the messages or handling behavior.

Written by the indexing model from the issue text.