Agentic products often don't answer straight away — they call a tool (search, a calculator, a database lookup) and fold the result into the answer. Rather than streaming that step as a raw log, this card summarizes it in one line: the function name and its key arguments — "here's what's happening right now."
Status typically has three stages: running (spinner), done (checkmark, one-line result summary), and failed (warning icon, what went wrong). Expanding the card reveals the full arguments and return value, but it starts collapsed by default so it doesn't clutter the conversation.
If you're exposing raw arguments, filter them server-side first so API keys or personal data can't leak through — printing the literal request for debugging convenience is also a path for sensitive data to end up on screen.
When to use
Use it wherever there is function calling or agent tool use. Not needed for a conversation that is pure text generation.