Keychain First Aid disappeared from Yosemite 10.11.2, apparently because of a security vulnerability, and hasn't been seen since.
I saw one post that suggested running First Aid on the affected volume from /Applications/Utilities/Disk Utility, but with no assurance that it would actually accomplish anything.
The new Great Equalizer is the SEND button.
In Memory Of Harv: Those who can make you believe absurdities can make you commit atrocities. ~Voltaire