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

# Using tools — overview

> Tools extend the chat agent for deeper reasoning and data analysis.

The chat can use tools to improve quality and handle data tasks:

* **Extended thinking** — lets the model think before answering; useful for open‑ended or multi‑step problems.
* **Numeric analysis** — run SQL‑like queries and charting against a **single CSV** from your knowledge base.
* **URL fetch** — paste a web **URL** and the assistant will fetch and use that page’s content for the response.

> You can enable **multiple tools together** (e.g., Extended thinking + Numeric analysis) when appropriate.