# Built-in Tools Reference

> Reference for every built-in mid-call tool an Edesy voice agent can use, from end call and transfer to booking, messaging, payment links, knowledge base search and workflows.

Source: https://edesy.in/docs/voice-agent/tools

Built-in tools are actions your agent can take during a call without you writing any code. Turn them on in the agent's **Tools** tab. Some need a connection first, such as a calendar, an SMS provider or a payment gateway. For your own APIs, add a [custom HTTP function](https://edesy.in/docs/voice-agent/features/function-calling) or start from a [function template](https://edesy.in/docs/voice-agent/tools/function-templates).

## All built-in tools

| Group | Tool | Tool name | Needs setup |
|-------|------|-----------|-------------|
| Call control | [End call](#end-call) | `end_call` | No (always on) |
| Call control | [Transfer call](#transfer-call) | `transfer_call` | Transfer destinations |
| Call control | [Transfer to another agent](#transfer-to-another-agent) | - | A squad |
| Call control | [Hold](#hold) | `hold_call` | No |
| Call control | [Schedule callback](#schedule-callback) | `schedule_callback` | No |
| Call control | [Set call outcome](#set-call-outcome) | `set_call_outcome` | No |
| Data | [Collect data](#collect-data) | `collect_data` | Data collection fields |
| Data | [Capture lead](#capture-lead) | `capture_lead` | No |
| Data | [Survey](#survey) | - | Survey questions |
| Data | [Search knowledge base](#search-knowledge-base) | `search_knowledge_base` | An attached knowledge base |
| Booking | [Book meeting](#book-meeting) | `book_meeting` | No |
| Booking | [Check calendar availability](#check-calendar-availability) | `check_calendar_availability` | A calendar connection |
| Booking | [Book calendar appointment](#book-calendar-appointment) | `book_calendar_appointment` | A calendar connection |
| Messaging | [Send SMS](#send-sms) | `send_sms` | An SMS provider |
| Messaging | [Send WhatsApp](#send-whatsapp) | `send_whatsapp` | A WhatsApp Business account |
| Messaging | [Send email](#send-email) | `send_email` | An email connection |
| Payments | [Send payment link](#send-payment-link) | `send_payment_link` | Razorpay, Stripe or PayU |
| Automation | [Run workflow](#run-workflow) | Your workflow's name | A workflow published as a tool |
| Automation | [Browser action](#browser-action) | `browser_action` | Browser capability |
| ERP | [ERP catalog and ordering](#erp-catalog-and-ordering) | - | An ERP connection |

## Call control

### End call

Ends the call and saves the conversation data. It is always on so the agent can hang up politely. Use the end-call guard in call behaviour settings to stop the agent ending a call too early.

### Transfer call

Transfers the caller to a person or department you have set up as a named destination in the **Behavior** tab. Transfers are cold: the caller is connected to the destination and the AI leaves the call. On Plivo you can also ring extra numbers at the same time ("also ring") and set a fallback chain with ring timeouts. You can also offer a DTMF menu ("press 1 for sales"). See [call transfer](https://edesy.in/docs/voice-agent/features/call-transfer).

### Transfer to another agent

In a squad (a multi-agent setup), one agent can hand the caller to another agent. The handoff can be decided by the LLM or follow a fixed order, and the next agent receives context (full history, a summary, variables only, or a custom strategy).

### Hold

Puts the caller on hold briefly, for example while a slow lookup runs.

### Schedule callback

Captures a callback time the caller asks for ("call me after 6") so a follow-up can be placed automatically.

### Set call outcome

Records the result of the call (for example qualified, not interested or callback). The outcome becomes the call's disposition and can trigger [outcome actions](https://edesy.in/docs/voice-agent/post-call/outcome-actions) and [workflows](https://edesy.in/docs/voice-agent/workflows).

## Data

### Collect data

Saves answers to the data collection fields you define in the **Behavior** tab (name, budget, pincode and so on) during the call. It is turned on automatically when you add data fields.

### Capture lead

Saves the caller's details as a lead.

### Survey

Asks a set of survey questions and records the answers. Results appear in survey analytics for the agent.

### Search knowledge base

Searches the knowledge base attached to the agent (hybrid vector and keyword search) and gives the answer to the LLM. Attach a knowledge base in the **Integrations** tab. See [knowledge base](https://edesy.in/docs/voice-agent/knowledge-base).

## Booking

### Book meeting

Records a meeting or consultation booking with the details the caller gave.

### Check calendar availability

Checks free slots on a connected Google Calendar, Cal.com or GoHighLevel calendar.

### Book calendar appointment

Creates the calendar event, with attendees and a video link where the calendar supports it. Connect the calendar in **Settings → Integrations** first. See [appointment booking](https://edesy.in/docs/voice-agent/examples/appointment-booking).

## Messaging

### Send SMS

Sends an SMS to the caller during the call, through Twilio, MSG91, Gupshup or Infobip.

### Send WhatsApp

Sends a WhatsApp message during the call, through your WhatsApp Business setup (Meta, WATI, Gupshup or Twilio).

### Send email

Sends an email during the call, for example a booking summary.

## Payments

### Send payment link

Creates a payment link with Razorpay, Stripe or PayU and sends it to the caller. Configure the payment provider in **Settings → Integrations**.

## Automation

### Run workflow

A [workflow](https://edesy.in/docs/voice-agent/workflows) can be published as a tool. The agent calls it by name mid-call, for example to update a Google Sheet or a CRM.

### Browser action

Lets the agent drive a web browser to fill a form, make a booking or read data from a site. It is managed by the browser capability.

### ERP catalog and ordering

With an ERP connection, the agent can look up the catalog and place orders during the call.

## Turn tools on

1. Open the agent and go to **Tools**.
2. Switch on the tools you need. If a tool needs setup, the card links to the right settings page.
3. Mention each tool in your prompt, for example "When the caller agrees, call `send_payment_link`."
4. Test the flow in the [Test Center](https://edesy.in/docs/voice-agent/agent-setup/evals) and check the tool calls in call history.

## FAQs

**Can the agent do a warm transfer, where it briefs the person first?**
No. Transfers are cold. You can pass context to the destination team through a workflow or CRM update.

**Can I copy tools to another agent?**
Yes. Use **Copy** on a function, or **Import** to bring tools from another agent.

**How do I connect my own API?**
Use a [custom HTTP function](https://edesy.in/docs/voice-agent/features/function-calling) and store secrets in the [credential vault](https://edesy.in/docs/voice-agent/tools/credential-vault).

**Do tools work with native audio agents?**
Yes. Gemini Live and OpenAI Realtime agents can call tools too.

## Related

- [Function templates](https://edesy.in/docs/voice-agent/tools/function-templates)
- [Credential vault](https://edesy.in/docs/voice-agent/tools/credential-vault)
- [Function calling](https://edesy.in/docs/voice-agent/features/function-calling)