IssueTracker

Please provide as much information as possible. At least, this should include a description of your issue and steps to reproduce the problem. If possible please provide a summary of what steps or workarounds you have already tried, and any docs or articles you found (un)helpful.

Problem you have encountered:
The JSON schema [1][2] error is shown after our user clicks the "Deploy" button at the moment.
There is no indication that the input(a typo in the schema) is wrong until deployment is started.
This seems too late, and this typo in the schema can be checked in the solution UI like other validations (e.g. minimum/maximum).


What you expected to happen:
When there is a typo in the schema, we can expect that we will meet some errors because the given properties does not match the schema.
But the current error message below is hard to understand for users who do not know what JSON schemas are.

"Manifest expansion encountered the following errors: Invalid properties for "---omitted---.

So it can make GCP more comfortable and efficient to use if this schema error can be checked in the solution UI like other validations (e.g. minimum/maximum).


Steps to reproduce:
NA


Other information (workarounds you have tried, documentation consulted, etc):
[1] https://cloud.google.com/deployment-manager/docs/configuration/templates/using-schemas
[2] https://www.jsonschemavalidator.net/