The effects and abilities of Shadow Clone are not secret (in Leaf at least). Naruto's Shadow Clone skills and ability to learn quickly are public knowledge in Leaf if I understand correctly. I mean he took Chuunin exams a year after graduating and passed. He's just considered the exception to the rule, most people don't have the resolve to do what he does with clones, they get sick.
The Shadow clones abilities are a secret,
especially the memorie transfer:
He raised both hands, gesturing for the genin to calm down. "Hang on, let me do the rundown. First of all, Shadow Clone is a top-secret jutsu of Leaf. Sure, people outside the village know that it exists, but I'm not sure any not-Leaf people know that the clones are fully intelligent, or that they transfer memories. Even inside the village, we keep that information pretty tight. You are not to talk about it with anyone aside from the people in this room and Shikaku. Even if they have a written document with my signature on it saying that it's okay to talk to them, you do not talk to anyone about Shadow Clone except for this family and Shikaku. Clear?"
Covertly discuss arranging for Naruto learning Ghost Scales, at Kei's discretion, and if Naruto swears secrecy. He learns quickly and it increases survivability of clones. Could ask Tower for resources to buy it for Naruto. Kei's call. .
Again, GS isn't a secret, we're juyt not allowed to share it outside of Goketsu without permission. And, who cares anyway? Naruto is already a high-priority target, Mist came with 3 S-rank ninja and a dozend jonin to abduct him.
Shadow clone users and some Leaf bloodlines are way bigger targets for abduction/termination than people with GS.
...Actually, Kei has probably a big target on her back. Mori bloodline, Nara secrets, Pangolin scroll and jutsu and the Shadow clone.
New Summoners won't have many contracts. Value of Scroll makes them vulnerable high priority target on front lines. Proposals:
This depends on the Clan, the summoners negotiation skills and their CP reserves. Asuma probably expects us to have useful summonings already or to able to quickly make them right now. One of the conditions during the contest for getting the Dog scroll was being able to make contacts with useful summons:
The Summoning Scroll prize is predicated on the Summons being useful to Leaf. Being 'unable to use' the summoning scroll means that you cannot get through the summoning training in a timeframe that Asuma finds acceptable, or that the Boss rejects you, or that you are unable to make useful contracts in a timely way, or that you refuse to use your summons for Hokage-assigned missions, etc. In any of these cases you will be required to step down as Summoner and return the scroll to the Hokage to be given to someone else.
Of course, Asuma isn't going to take the scroll away right now, but that's his expectations. Being able to communicate long distance is pretty useful, but for Noburi that means that he can use a Toad as guard. Him staying in Leaf means he can only supply chakra to the summoners, not other ninja.
And our strategy right now should definitly be "get as many Wakahisa/Minawa (the Hot spring guys) as quickly and soon as possible". Same with getting Isan equipped with Skywalkers and use them hopefully to suprise Rock.
edit:
Also get the Kurosawa to print us Skywalkers and supply them via the summoning network. Superior Logistics and all that.