Hopefully, you did not judge blog post by it’s title as this may be a gem.
From 12.2, Broker Controlled Database Initialization Parameters and SQL Statements
The following database initialization parameters are controlled by broker configurable properties. Therefore, you should not set these parameters manually:
LOG_ARCHIVE_DEST_n
LOG_ARCHIVE_DEST_STATE_n
ARCHIVE_LAG_TARGET
DB_FILE_NAME_CONVERT
LOG_ARCHIVE_FORMAT
LOG_ARCHIVE_MAX_PROCESSES
LOG_ARCHIVE_MIN_SUCCEED_DEST
LOG_ARCHIVE_TRACE
LOG_FILE_NAME_CONVERT
STANDBY_FILE_MANAGEMENT
What’s missing are information from prior releases not carried forward to future release.
Removed the FAL_SERVER and FAL_CLIENT properties; these are managed automatically by Data Guard broker.
https://docs.oracle.com/cd/B10501_01/server.920/a96629/whatsnew.htm
Unfortunately for me, I started with DG in 10g and totally missed 9i NF for DG.