This template should only be used on references input as free text. Access signaling has been integrated in the CS1/2 citation templates. See the relevant documentation.
Use {{open access}} to indicate manually that a research-based publication is available under open access (not merely that it's accessible without subscription etc.).
For citations input with citation templates such as {{cite journal}}, use the relevant parameters (such as |doi-access=free) to indicate the access level for a given identifier.
