CLI guide: Add description of [] brackets to chapter "3.8. Add a Value with Special Characters"
If user wants to use [ or ] in String values, he needs to use quotation marks:
[standalone@localhost:9990 /] /system-property=aaa:add(value=[]) { "outcome" => "failed", "failure-description" => "WFLYCTL0097: Wrong type for 'value'. Expected [EXPRESSION, STRING] but was LIST", "rolled-back" => true } [standalone@localhost:9990 /] /system-property=aaa:add(value="[]") {"outcome" => "success"} [standalone@localhost:9990 /]