# Tool Calls Section

> An expandable section that shows AI agent tool usage as a collapsible timeline with stacked category icons and per-call inputs and outputs.

- Author: [GAIA UI](https://21st.dev/@heygaia)
- License: no-license
- Tags: Accordion, Timeline, AI, Agent, Tool Call
- Live preview: https://21st.dev/@heygaia/components/tool-calls-section

## Install

```bash
npx shadcn@latest add "https://21st.dev/r/heygaia/tool-calls-section?api_key=$API_KEY_21ST"
```

Requires a 21st API key (generate one at https://21st.dev/mcp) passed as `API_KEY_21ST`. Free accounts get a limited number of installs per day; unlimited on a paid plan — see https://21st.dev/pricing.

Full component directory: https://21st.dev/llms.txt · More like this: https://21st.dev/community/components/s/accordion.md