help_text on a SerializerMethodField not displayed if list type

[khameeteman]

Bug Report

Description

Help text is not displayed in the following case:

class Serializer(serializers.ModelSerializer):
    field = serializers.SerializerMethodField('_field', help_text="field info")

    def _field(self, obj) -> list[dict]:
        return []

generates openapi.yml:

field:
  description: field info
  type: array
  items:
    type: object

The description key is missing in the items dict.

Is this a regression?

Don't know

Minimal Reproduction

Stack trace / Error message

Your Environment

[khameeteman]

As a workaround, the following seems to work:

    @swagger_serializer_method(serializers.ListField(
        child=serializers.JSONField(help_text="field info"),  # or `help_text=field.help_text`
    ))
    def _field(self, obj) -> list[dict]:
        return []