Return the persons with significant control (PSCs / beneficial owners) of a company - persons on a statutory-threshold register (typically >25% ownership or voting rights).
**When to call this tool.** Only when the user explicitly asks about 'beneficial owners', 'UBO', 'PSC', 'who controls', or the >25% threshold register. For plain 'shareholders' / 'members' / '股东' / '持股人' questions, call `get_shareholders` instead - it is a DIFFERENT register (the full equity roster with no threshold). A 10% shareholder shows up on the members register but not here; a corporate trustee can show up here without being on the members register.
Each entry has `name`, `kind` (individual / corporate-entity / etc.), `nature_of_control` (e.g. ownership-of-shares-75-to-100-percent, voting-rights-25-to-50-percent), `notified_on`, and `ceased_on` if applicable. Raw upstream fields come through verbatim under `jurisdiction_data`. Returns an empty list (not an error) for companies whose registry supports PSCs but has no filing on record.
Many countries keep beneficial-ownership data in a separate register from the main company registry, or restrict it to authenticated / AML-obliged callers. Unsupported jurisdictions return 501, sometimes with `alternative_tool='get_shareholders'` when the caller probably wanted registered shareholders instead. Per-country availability, historical-entry behaviour, and paid-tier gates - call `list_jurisdictions({jurisdiction:"<code>"})`.
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