An agent built in Microsoft Foundry makes many decisions in a single run. It calls a model, selects a tool, reads the tool result, and calls the model again. When the answer is slow or wrong, the cause sits somewhere inside that sequence, and the final response gives no hint about which step failed.Foundry records this sequence as OpenTelemetry traces. By default, a hosted agent sends them to Application Insights, which is a good place to start. Two gaps remain for a team that builds agents every day. The first gap appears during development. A developer who changes a prompt or a tool wants to see the spans of that one run within seconds, on a laptop, without a deployed project. The second gap appears after deployment. Agent owners want a shared dashboard with run counts, latency percentiles, token use, tool latency, and errors, and they want to query raw spans with the same language they use for the rest of their data.