How do I set custom field descriptions in the GraphQL schema?

CALL graphql.idl('
type Movie  {
      custom description of field
      title: String!  

In Apollo triple quotes work,
Via "CALL graphql.idl" and POST to the 'http://localhost:7474/graphql/idl/` - no

The custom field descriptions need to look like this in your schema:

Describes a User of the system
type User {
  id: ID!
  userName: String
  password: String

At least, that's how it's worked for me.

in what environment do you set the schema, and in what environment can you see the result?

I'm using GraphQL for my API. That is in the schema definition.

custom field descriptions are not saved in the Neo4j schema.
Only in the GraphQL server schema (apollo)