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Read user comments, check how many stars the app has, etc.
Are you talking about apps like lifelog or what's new?
Are you asking if Sony apps, such as, album, walkman, xperia lounge, xperia diagnostics, etc can harm your phone?
the answer no, those apps are not going to harm your phone.
Those apps should be fine, but just like any other app check who is the app developer, the permissions it require.