These last guides are for whoever runs Mana for the organization. mana is the local command-line tool, which talks to the same store the dashboard and the agents do.
mana memory report lists every active memory of the organization with its lifecycle: its key, its type, its audience, its sensitivity, who wrote it, when, how many revisions it has, and how many times a retrieval returned it as evidence.
Read it to decide what to keep, what to merge, and what to retire. A memory that no retrieval ever returned is the first question the report answers.