AI-103: Developing AI Apps and Agents on Azure

In Foundry Agent Service, the memory tool's scope parameter determines which pool of stored memory items a given request can read from and write to. Setting scope to the dynamic {{$conversationId}} variable ties memory items to the unique ID of the current conversation/thread, so each new session (which gets a new conversation ID) cannot see memory captured in a different, earlier conversation. In contrast, scoping to {{$userId}} intentionally keeps the same identity key across sessions so memory persists and personalizes future sessions for that user — the opposite of the requirement — while a static 'session' or 'global' value would create one shared, non-varying bucket used by all calls rather than isolating memory per individual session.