> ## Documentation Index
> Fetch the complete documentation index at: https://new-fb342056.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Tools & Functions

> Explore the built-in tools and functions that enhance your AI assistant’s capabilities during calls

[Robocallz.ai](http://Robocallz.ai) offers built-in “tools” that your AI assistant can use during a call. These help you shape the conversation flow and automate actions like transferring calls or scheduling appointments.

## 1. End Call Tool

* **Purpose**: Tells the AI to politely wrap up the conversation.
* **How It Works**: You can specify in the system prompt or logic, for instance: “If the user says `goodbye`, end the call.”
* **Configuration**: In the assistant’s settings, you can define any conditions that should trigger the end call.

## 2. Transfer Tool

* **Purpose**: Moves the caller from the AI assistant to a human agent or external phone number.
* **Use Cases**: Warm leads on a sales call, escalations on a support call, etc.
* **Settings**: In the assistant’s config, add the phone number or department the call should go to, and optionally a short hold message.

## 3. Appointment Scheduler

* **Purpose**: Lets the AI check your calendar availability (e.g. via [Cal.com](http://Cal.com) or Google Calendar) and book an appointment.
* **Typical Flow**:

## 1. AI offers scheduling.

## 2. Caller selects date/time.

## 3. AI confirms and sends a confirmation (using email or SMS if configured).

## 4. No-Code Automation Platform

* **Purpose**: After or during calls, the AI can trigger actions in the automation platform (like updating a CRM, sending an email, or logging results in Google Sheets).
* **Setup**: Link your assistant with the “Automation” tab, choose triggers (“Call Ended,” “Customer Agrees,” etc.), and pick the action (send a Slack notification or add a row in Sheets).

## 5. Custom Mid-Call Tools

* **Purpose**: Create your own custom API integrations that the AI can use during calls.
* **Use Cases**: Check inventory, verify customer data, fetch real-time information, or integrate with your own systems.
* **Setup**: Define API endpoints, parameters, and when the AI should use them.
* For detailed setup instructions and examples, see our [Custom Mid-Call Tools Guide](/en/ai-assistants/custom-tools).

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**Note:** Tools can be combined. For instance, the AI can use a custom tool to check availability, then schedule an appointment, and finally transfer to a human agent if needed.