aws ec2 describe-instances --filters tag: seems to be not working (or docs is missing/misleading)

Problem

Trying to use aws ec2 describe-instance (version 1.1.0) with tag: filter which is mentioned in docs at http://docs.aws.amazon.com/cli/latest/reference/ec2/describe-instances.html but it doesn't seem to be working. Quote from documentation: "tag: --filters the response based on a specific tag/value combination." Tried several formats (just guessing, trying format used by http://docs.aws.amazon.com/AWSEC2/latest/CommandLineReference/ApiReference-cmd-DescribeInstances.html) but no luck. This does not complain but returns no instances: aws ec2 describe-instances --filters Name=tag:,Values=Name=ADS-prod-ads This one fails: aws ec2 describe-instances --filters tag:Name=ADS-prod-ads Unknown key 'tag:Name' for parameter --filters, valid choices are: Values, Name Just for reference, using tag-value works (just to show that tag Name=ADS-prod-ads exists): aws ec2 describe-instances --filters Name=tag-value,Values=ADS-prod-ads | jq '.Reservations[].Instances[].Tags[]' { "Key": "Name", "Value": "ADS-prod-ads" }