Evaluation metric example: Check if tool was called

Description

AI evaluation in n8n

This is a template for n8n's evaluation feature.

Evaluation is a technique for getting confidence that your AI workflow performs reliably, by running a test dataset containing different inputs through the workflow.

By calculating a metric (score) for each input, you can see where the workflow is performing well and where it isn't.

How it works

This template shows how to calculate a workflow evaluation metric: whether a specific tool was called by an agent.

We use an evaluation trigger to read in our dataset
It is wired up in parallel with the regular trigger so that the workflow can be started from either one. More info
We make sure that the agent outputs the list of tools that it used
We then check whether the expected tool (from the dataset) is in that list
Finally we pass this information back to n8n as a metric