Ao fazer os testes veio o seguinte retorno:
{ "_type": "com.amazon.coral.service#AccessDeniedException", "Message": "User: arn:aws:sts::315515841269:assumed-role/PhotoCollection-ROLE-DynamoDBAcesso_a_tabela/BackplaneAssumeRoleSession is not authorized to perform: dynamodb:Scan on resource: arn:aws:dynamodb:sa-east-1:315515841269:table/PhotoCollection" }