This tool is extremely accurate compared to others(as far as determining the letters). The descriptions aren't bad either. Cautious and shy wouldn't be good adjectives for me personally although I am definitely INFP. However this is me - for many other infps I see this more in evidence.
I have just launched a Shopify Store "Manocat". To celebrate its grand opening I am offering HARD GOODS (Single Item each) Absolutely Free. You just pay shipping and Handling and I shall send your selected product to your given mailing address.