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Documentation›Voice agent›Built-in tools

Voice agent

Built-in tools

Native agent capabilities: transfers, bookings, knowledge search, call end.

Built-in tools (system tools) are ready-to-use capabilities you enable with one click. They cover the recurring use cases: transfer a call, take a reservation, search the knowledge base, end the conversation politely.

Catalogue

end_the_call
Ends the call professionally when the conversation is complete. Always on and cannot be disabled.
transfer_to_mobile_operator
Hands the call to a human operator via the mobile app. Configurable by hours and departments.
transfer_to_phone
Forwards to a fixed phone number (switchboard, company mobile). Mutually exclusive with transfer_to_mobile_operator.
transfer_to_campaign_operator
Forwards to an operator inside an active dialer campaign. Useful for mixed outbound + human handover scenarios.
make_reservation
Creates a booking in the unified calendar, with SMS confirmation and optional Google/Apple Calendar sync.
search_knowledge_base
Searches the company knowledge base (documents, manuals, price lists uploaded in the Documents section).

Typical configuration

  1. 1

    Open the agent's tools section

    /ai-agents → select the agent → Built-in tools tab.

  2. 2

    Enable a tool

    Toggle on/off. If a tool conflicts with another already enabled, the system blocks the change and tells you which one to disable first.

  3. 3

    Fill in required parameters

    E.g. availability hours for transfers, knowledge base to query, SMS template for bookings.

  4. 4

    Save and test

    Run a test from the playground to verify the tool activates when expected.

Mutual exclusions

Some tools cannot coexist because they cover the same intent with different strategies. Example: transfer_to_mobile_operator and transfer_to_phone are mutually exclusive, you must choose whether transfers go to a human operator on the app or to a fixed number.

Best practices

Enable only the tools that are truly needed. More tools = more decisions for the model = longer response time. Start with 2-3, measure, add more only when an uncovered case emerges.

When to prefer a built-in tool over an External Tool

  • You need the out-of-the-box capability. Transfer, booking, RAG: prefer the built-in tool. Already optimized and integrated with our systems.
  • You need to talk to your own system. You need an External Tool, not a built-in one.
  • You want the standard MCP protocol. See the dedicated page: MCP servers expose many remote tools with a single uniform protocol.

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