The following commands are user-facing but specify {strict: false} for how they parse their input. This means if the operator misspells an argument to the commands or includes a non-existing one, they won't always get an error. Changing these commands to be {strict: true} would protect against this but should be weighed against driver's and/or server's ability to send these commands internally without needing to know which version of the server they are talking with.

• moveRange in src/mongo/s/request_types/move_range_request.idl
• refineCollectionShardKey in src/mongo/s/request_types/refine_collection_shard_key.idl
• enableSharding in src/mongo/s/request_types/sharded_ddl_commands.idl
• setAllowMigrations in src/mongo/s/request_types/set_allow_migrations.idl
• configureCollectionBalancing in src/mongo/s/request_types/configure_collection_balancing.idl
• clearJumboFlag in src/mongo/s/request_types/clear_jumbo_flag.idl

import pathlib
import yaml

def check_file(pathname):
    with open(pathname) as data:
        blob = yaml.safe_load(data)
    for (command, command_details) in blob.get("commands", {}).items():
        if not command_details.get("strict", True):
            yield command_details["command_name"]

for pathname in pathlib.Path().rglob("src/mongo/**/*.idl"):
    if str(pathname) == "src/mongo/idl/unittest.idl":
        continue
    for command in check_file(pathname):
        if not command.startswith("_"):
            print(f"{command} in {pathname}")