> ## Documentation Index
> Fetch the complete documentation index at: https://docs.keywordsai.co/llms.txt
> Use this file to discover all available pages before exploring further.

# Override span input & output

> Explicitly control what appears as a span’s input/output in the trace UI

Use OpenTelemetry AI semconv attributes on the current span, inside your `@workflow`-decorated function.

* Set `SpanAttributes.TRACELOOP_ENTITY_INPUT` and/or `SpanAttributes.TRACELOOP_ENTITY_OUTPUT`.
* Pass these via the `attributes` argument of `update_current_span` (not `keywordsai_params`).
* Values must be JSON‑serializable strings, so use `json.dumps(...)`.
* Keep any custom metadata in `keywordsai_params["metadata"]` as needed.

<CodeGroup>
  ```python Python theme={"system"}
  import json
  from opentelemetry.semconv_ai import SpanAttributes
  from keywordsai_tracing.main import KeywordsAITelemetry
  from keywordsai_tracing.decorators import workflow

  k_tl = KeywordsAITelemetry()
  client = k_tl.get_client()

  @workflow(name="update_attributes_test")
  def update_attributes_test(input: str):
      # Override what is shown as the span input (and optionally output)
      force_set_attributes = {
          SpanAttributes.TRACELOOP_ENTITY_INPUT: json.dumps({
              "args": [],
              "kwargs": {"text": "hiiiiiii"}
          }),
          # Optional: also override output
          # SpanAttributes.TRACELOOP_ENTITY_OUTPUT: json.dumps("Some desired output")
      }

      client.update_current_span(
          attributes=force_set_attributes,
          name="update_attributes_test",  # optionally rename the current span
          # Keep metadata here if you need it in the trace
          keywordsai_params={"metadata": {"test": "test"}},
      )

      some_desired_output = "Some desired output"
      return some_desired_output

  if __name__ == "__main__":
      update_attributes_test("Some input")
  ```
</CodeGroup>

<Note>
  Use `update_current_span(attributes=...)` to override the span’s displayed input/output. `keywordsai_params` do not map `input` or `output` to span attributes; they’re for metadata and KeywordsAI-specific options. After overriding, the trace view will display your custom values for the selected span.
</Note>