Extract nutrition facts from a label image

Goal

Convert a supplied nutrition-label image into typed fields through a read-only tool call, then review uncertain values.

Steps

1. Load a permitted PNG/JPEG and send it as an image block with a prompt naming calories, fat, cholesterol, carbs, and protein. [source02]
2. Define print_nutrition_info with numeric tool properties and submit it through client.messages.create(..., tools=tools). [source02]
3. Validate units and compare the JSON fields with the image; mark unreadable or ambiguous values for human review. [source02]

How to verify

Compare all five returned nutrients and units with the supplied image; confirm any obscured value is marked uncertain instead of presented as exact.

Troubleshooting

If the tool omits a nutrient or confuses serving units, crop the label more clearly and request human review for unreadable text; do not infer a precise value.