aws ssm put-parameter --cli-input-json question

[davidu1975]

aws ssm put-parameter --generate-cli-skeleton creates
{
"Name": "",
"Description": "",
"Value": "",
"Type": "String",
"KeyId": "",
"Overwrite": true,
"AllowedPattern": "",
"Tags": [
{
"Key": "",
"Value": ""
}
],
"Tier": "Standard",
"Policies": "",
"DataType": ""
}

Cant seem to add update more than one parameter at a time - it complains about invalid json syntax - can this be done and if so whats the format of the json