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

# Tools

> Connect pre-built integrations and custom tools to your agents.

Tools let your agents take actions beyond answering questions: sending emails, reading calendars, updating databases, posting to Slack, and calling any API. Tools are configured once in **Connections > Tools** and then attached to individual agents in the Agent Builder.

## What's available

* **Pre-built connectors**: 25+ ready-to-use integrations including Gmail, Slack, Google Calendar, Google Drive, Google Tasks, Notion, Outlook, ClickUp, Discord, GitHub, Twitter/X, Calendly, Spotify, YouTube, and more.
* **Custom OpenAPI tools**: Connect any REST API by uploading its OpenAPI spec.
* **Custom ACI tools**: Define tool logic for APIs with complex authentication requirements.
* **MCP servers**: Connect any Model Context Protocol server.

## Connecting a tool

1. Go to **Connections > Tools** in the sidebar.
2. Select an integration from the list.
3. Authenticate via OAuth or API key.
4. Add the tool to your agent in the Agent Builder.

## Auth modes

**Shared auth** means all users share the same credentials. Use this for internal tools and service accounts where individual identity does not matter.

**Per-user auth** means each end user authenticates independently. Use this for tools that act on behalf of individual users, for example sending email from a user's own Gmail account.

## Full tool reference

See [Tools and Connectors](../../agent-studio/tools/overview) in Integrations for per-tool setup guides, required OAuth scopes, and capability details.