> For clean Markdown of any page, append .md to the page URL.
> For a complete documentation index, see https://docs.nvidia.com/nemo-platform/llms.txt.
> For AI client integration (Claude Code, Cursor, etc.), connect to the MCP server at https://docs.nvidia.com/nemo-platform/_mcp/server.

# NeMo Studio Traces

> Inspect ingested traces, spans, and session detail from agent telemetry.

Use **Observability > Traces** in the NeMo Studio workspace sidebar to inspect telemetry ingested from agent runs.

Traces is enabled by default. An administrator can disable it by setting `studio.feature_flags.intake_enabled: false` in the platform configuration and restarting Studio.

## Traces and Spans Tables

The **Traces** and **Spans** tabs list ingested telemetry at different granularity:

| Tab    | Columns                                                                             |
| ------ | ----------------------------------------------------------------------------------- |
| Traces | Trace, input, output, duration, span count, errors, tokens, cost, started.          |
| Spans  | Status, kind, span, input, output, subject, trace, duration, tokens, cost, started. |

Select a row in either table to open the session it belongs to.

## Session Detail

The session detail page shows a summary header, then the selected trace's spans. Use the **Tree** / **List** toggle to switch between a nested span tree and a flat list, and **Collapse all** / **Expand all** to manage the tree view.

Selecting a span opens its detail body. Studio renders a specialized view for known span kinds — LLM, tool, agent, chain, embedding, reranker, retriever, guardrail, and evaluator — and falls back to a generic view for unrecognized kinds. Each span body includes metadata, an annotations panel, and a raw JSON view for debugging.

Evaluation test-case runs reuse this same session detail view; see [Compare Runs Side by Side](/documentation/studio/experiments#compare-runs-side-by-side) in NeMo Studio Experiments.

## Related Topics

* [NeMo Studio Experiments](/documentation/studio/experiments)
* [NeMo Studio Insights](/documentation/studio/insights)