If you cannot explain the tool calls, you do not have an agent product
Support opens a session. The UI says two searches and six tools. Foundry traces show something else. App Insights has a third story. Nobody can tell whether the agent searched knowledge, hallucinated a citation path, or the counter lied. That is not a cosmetic bug. That is a missing product surface.
Activity timelines must reconcile platform traces, MCP knowledge searches, and UI counts. Persist normalized events, not only chat bubbles. Count knowledge searches separately from generic tool invocations. Traceability is part of the customer contract for regulated knowledge agents.
Figure 1. The shell shows activity chips. Correlated traces must tell the same story, or support has three truths. Source: Microsoft Learn: Application Insights correlation.
Figure 2. Persist normalized activity events and reconcile them with platform traces. UI counts alone are not an audit trail. Source: Microsoft Learn: Application Insights overview.