QSDA extracts and saves only metadata from your Qlik Sense Applications. Metadata includes things like Table names, Field names and Measure definitions. QSDA does not collect data values from your app. No field or chart values are collected.
Application access is limited by the userid associated with the QSDA Connection definition.
Access to unpublished personal sheets for other users is limited to what is allowed by the Qlik Sense security rules.
You may wish to create a special userid for use only with QSDA. This is especially useful when using the CERTIFICATE connection type.