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How to/Log your application

Track tool calls

Track external system calls triggered by LLM responses in your agentic workflows. Tool calls represent interactions with external services, allowing you to monitor execution time and responses.

How to log tool calls

const toolCall = completion.choices[0].message.tool_calls[0];
const traceToolCall = trace.toolCall({
    id: toolCall.id,
    name: toolCall.function.name,
    description: "Get current temperature for a given location.",
    args: toolCall.function.arguments,
    tags: { location: toolCall.function.arguments["location"] }
});
// Note: Replace 'trace.toolCall' with 'span.toolCall' when you are creating tool calls within an existing span
 
try {
    const result = callExternalService(toolCall.function.name, toolCall.function.arguments);
    traceToolCall.result(result);
} catch (error) {
    traceToolCall.error(error);
}

Log multi-turn interactions as a session

Learn how to group related traces into sessions to track complete user interactions with your GenAI system.

Use tags on nodes

Tag your traces to group and filter workflow data effectively. Add tags to any node type - spans, generations, retrievals, events, and more.

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