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Tool calls let your agent take action during a conversation, like searching a knowledge base, scheduling a callback, transferring a call, or pulling data from your own system.

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What tools your agent can use

CategoryWhat it doesExamples
Built-in toolsReady to use on every agent.@endCall, @callMeLater, @waitForUserToReturn
Knowledge basesLet the agent answer from your own documents.@searchKnowledgeBase
Calendar toolsBook appointments during a call.Calendly, Cal.com, HubSpot
Transfer toolsMove the call to another agent or number.@transferCall:sales
Collect data toolsActively capture specific info from the caller.@collect_data:email
Custom toolsConnect to your own system mid-call.CRM lookup, account check

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Add a tool to your agent

1

Open the Tools panel

In the agent builder, switch to the Tools panel in the sidebar to see every tool category available to your agent.
2

Pick a category and configure the tool

Choose the tool category that fits your use case (for example, a calendar connection or a custom tool) and fill in the configuration form.
3

Reference the tool in your prompt

In the prompt editor, click the tool in the Tools sidebar to insert it as @toolName. The sidebar always inserts the correct reference, so you don’t have to remember the exact name.
In the prompt, you only define when the agent should use a tool, not how the tool works technically. The technical configuration lives in the agent settings.

Tool Calls

Learn how to use tool calls to let your agent perform specific actions during a call.

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Next Steps

Advanced: Knowledge Bases

Give your agent access to your own information so it can answer questions during calls.