A show description should help a new listener make a decision. It does not need to list every topic the series might cover. Start with the recurring subject, the person it helps and what a normal episode offers.
Answer three practical questions
What is the show about? Who is likely to find it useful or interesting? What will they hear: interviews, a short lesson, reporting or another format? Put the most useful answer near the beginning rather than opening with a long introduction to the production team.
For example, a gardening show can name the kind of garden and the problems it discusses. It does not need a string of broad claims such as the best and most complete resource. Concrete scope gives the listener more information than praise.
If episodes depend on a location, language or experience level, say so clearly. Mention a release rhythm only when the team can realistically maintain it.
Check the description against real episodes
Compare the description with two or three available or planned installments. If it promises something none of them delivers, adjust the wording or the editorial plan. Avoid using a popular search phrase merely because it attracts attention outside the show's actual subject.
Preview the text in the feed and a normal listening view. Check whether formatting survives and whether the opening remains understandable when only a short part is shown.
Keep show-level description changes separate from episode summaries. A series identity should remain useful after the next item is published. Review it when the show's scope changes meaningfully, rather than rewriting it for every guest or temporary campaign.