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

# Tools Overview

> Function nodes, system tools, and client-defined tools

Tools give your agent capabilities beyond the conversation flow: search, math, custom logic, and API-backed actions. There are three types.

## Types of tools

<Columns cols={2}>
  <Card title="Function nodes" icon="diagram-project" href="/configure/tools/function-nodes">
    Built in the agent editor. Every function node in a conversation graph becomes a tool automatically. Preview what the agent sees in the editor.
  </Card>

  <Card title="System tools" icon="bolt" href="/configure/tools/server-tools">
    Provided by the system and activated per agent, e.g. search the web, math, current time. Turn them on when you need them.
  </Card>

  <Card title="Client-defined tools" icon="plug" href="/configure/tools/client-tools">
    Custom tools you define and expose. Only accessible through the API; use them when you control the client or integration.
  </Card>
</Columns>