Not every change in the surrounding record is significant. A new entry on a register, a fresh filing, an updated address: most of these are routine activity, and most are not worth raising. The work of separating early warning from background is one of the more nuanced parts of keeping.
The first distinction is between expected and unexpected change. A regulated entity that files quarterly is expected to file quarterly; the filing itself is not a signal. A regulated entity that files an unscheduled disclosure is signalling something, and the disclosure itself is the place to start.
The second is between change in the principal's record and change in the surrounding context. A new article in a publication about a sector the principal operates in may or may not concern them. The judgement about whether it does turns on what the article contains and how it relates to the principal's present position.
The third is between activity by the principal and activity about the principal. A change in a record the principal made themselves (a property transfer, a corporate filing they signed) is generally known to them already. A change in a record made by someone else (an article naming them, a regulatory inquiry whose existence becomes visible, a new entry in a database that has aggregated information about them) is the more important category for early warning.
The fourth is between isolated and patterned. A single inquiry into a record may be ordinary. A series of inquiries across related records, within a compressed timeframe, is a pattern that may indicate someone is preparing something. The desk watches for the pattern rather than for the individual inquiry.
The work of separating signal from routine is the work the desk earns its keep on. The reader who receives a notice from the desk knows that the signal has passed several filters before reaching them.