## Require a tool on a procedure step

1. While editing a step, add a field and choose the **Tool** field type.
2. Set the field name and help text as you would for any data-collection field.
3. To accept only tools that are currently available, select **Only accept “Available” tools**.
4. Use the **Validations** menu to constrain valid input:

- **Type** restricts input to a tool [subtype](https://docs.firstresonance.io/build-hardware/tools/manage-tool-models#categorize-tools-with-subtypes), spanning multiple models.
   - **Part Number** restricts input to one specific tool model.

For the full list of step field types, see [Step field types](https://docs.firstresonance.io/build-hardware/procedures/step-field-types).

## Select a tool during a run

When an operator reaches the step in a run, the Tool field shows a **Select a tool…** picker listing tool inventory that meets the field’s validations. The operator picks the tool they used to complete the field.