i far as i know there is not any tool for sandbox There are some points if they exit you would be in sandbox 1: your site would be crawled 2: There would be no SERP 3: All the pages would also be indexed in google Everything would be fine except your ranking in google. You are in sandbox - 100%
I just know if your site is new and you can not see it in google,but they crawled your site,maybe it is in sandbox.
sandbox is not yet proven theory..and may b its called differently inside Google...there r few tools to check it but they will check whether ur site is banned by Google or not...not exactly the sandbox thing common symptoms are PR drop and lost rankings
Very simple - Just search a unique keypharse or the site title tag if the site doesn't appear in the top results your sanboxed
I m not a seo professional...but always interested to read about the seo conepts...it is must for us to get top ranking in Google.
if web give good response SERP, but after some time SERP down, its means you have done something wrong do your website.