Create a Logline
Per @mrbig: What is a logline?: a brief summary (25 to 40 words) of a story for film, television or book that states the central conflict and an emotional "hook", with the purpose of stimulating...
Per @mrbig:
What is a logline?: a brief summary (25 to 40 words) of a story for film, television or book that states the central conflict and an emotional "hook", with the purpose of stimulating interest (Wikipedia).
A logline is evaluated not exactly for what a story is (since it does not contain a complete story), but for what it can be. Suggestions usually seek to maximize the dramatic potential of the idea.
Create a Logline, and you can chose to reply to others with your interpretation of how their stories would go.