Leak-preventing docs WSJ Crossword Clue

Think of a legal shield that keeps secrets safe.

???? are legal agreements where parties agree not to disclose confidential information.

The clue uses 'docs' as an abbreviation for documents, and 'leak-preventing' suggests documents that prevent leaks of information. ????, or Non-Disclosure Agreements, are legal documents that ensure parties do not share confidential information.

Docs that deal with sensitive information, Pre-hiring contracts, briefly, Signed vows of secrecy, for short, Contracts for sensitive info, Docs often signed before starting a new job