I have an app that scans NFC tags, collects the data from the tag and sends that data to the server. The data on the tag is in the following format:
1,3,3001
You could create a custom mimeType in your NDEF message and then create an intent-filter which matches it exactly. This would mean your app would be launched as it is the most specific filter.
Example:
Edit: Alternatively if you cannot create a custom mimeType then perhaps your utility will create a custom URL? Then you can create a filter for the custom url instead: