Verifying business ideas based on keywords derived from a description of the business idea I want to find keywords for a business idea. The problem is that I have a hard time summarizing the business idea to one to three terms that would describe it.

Is there a (machine learning) tool that takes a description as an input and outputs - intelligently - categories and/or explicit search terms that fit the business idea most likely?
You need keyword extraction technics. Basically they try to find the most important words in the text. There are many types of such methods.