For

.get

methods, you always need to provide an

id

, and sometimes need to provide additional property values. What is required here is ultimately based on what the semantics of the underlying Terraform AWS provider

Read

method, which is unfortunately not documented robustly. Most of the AWS resources don't require anything beyond the

id

, but some do. In particular,

aws_lambda_function

in Terraform does use the

name

and optionally the

qualifier

to look up the function instead of using the

id

. That error message doesn't look great though - and I suspect we can report a better error message in this case.