This change updates the docstring for `agent_engine_id` to clarify that only the resource ID is expected. It also adds a warning log if the provided `agent_engine_id` contains a '/' character, suggesting it might be a full resource path, and provides guidance on how to extract the ID. Unit tests are added to verify the warning behavior.
Merge: https://github.com/google/adk-python/pull/2941
Co-authored-by: George Weale <gweale@google.com>
PiperOrigin-RevId: 838845022
