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

# The Advanced Builder

> Find settings, review edits, and save your assistant.

Open an assistant and choose **Advanced**. Use **Search all settings** in the sidebar to jump to a field.

| Section | Settings |
| - | - |
| General | Call direction, identity, phone number, timezone, and engine |
| Voice & speech | Languages, voice provider, model, voice, ambience, and fillers |
| Brain & prompt | Language model and system prompt |
| Greeting | Who speaks first and the opening message |
| Knowledgebase | Sources and lookup behavior |
| Tools & actions | Built-in tools, custom tools, and MCP servers |
| Variables | Context sent into the call and data extracted afterward |
| Webhooks & channels | Event delivery and channel settings |
| Web widget | The embedded voice and chat experience |
| Call behavior | Turn taking, timeouts, recording, and voicemail |
| Activity | Recent calls and performance |

Use **Review** to inspect pending edits, **Discard** to clear them, or **Save assistant** to apply them across sections. Save before testing. If a section shows **Needs attention**, resolve the listed validation errors. The [AI Advisor](https://docs.nicecall.ai/ai-assistants/ai-advisor.md) provides separate recommendations.

Use [Version History](https://docs.nicecall.ai/ai-assistants/version-history.md) to review saved edits and restore individual settings.


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