Rules of thumb
Three habits will improve almost any prompt you write.
Specify sources and time range
Tell Lumnic where to look and how far back. "Using only Slack," "from last week," "across Drive and email." Scoping the query produces tighter, faster, more relevant answers.
Ask for a format
Say how you want the answer: bullets, paragraphs, a table, a short summary. If you don't specify, you'll get Lumnic's default, which may not match what you need to do next with it.
One task per prompt
Keep each query focused on a single job. If you need to draft a document and analyze usage data and summarize a thread, run three prompts. Splitting tasks keeps each answer sharp and makes it easy to refine one without disturbing the others.
Put together, a strong prompt usually names the task, the sources, the time range, the audience or reader, and the output format. You won't need all five every time, but the more of them you include, the better the answer.