Guidance:
All developers seeking to access the Call Log or SMS permissions must successfully complete the Permissions Declaration Form. By submitting this form, you verify that the app’s access to these permissions is only for the purposes described below and that you will submit an updated form to seek additional approval prior to any revised / new scope for permission usage. You must fill out one Declaration Form for each app.

Google Play will review the submitted Declaration Form and notify you by email whether your request has been approved or denied. Your app is still subject to Google Play review and approval. Please make sure that your app complies with all other Play Developer Program Policies (https://play.google.com/about/developer-content-policy).

When Should You Complete This Form:
You should only seek Call Log or SMS permissions to enable your app’s core functionality.

Core functionality is the main purpose of the app. It's the feature most prominently documented and promoted in the app’s description; no other feature is more central to the app’s functionality. If this feature is not provided, the app is “broken” (i.e., will not perform as a user would expect).