Use Specific Self-Hosted Action Runner?

We got multiple self-hosted Action Runners with similar Tag.
Want to use a specific Self-Hosted Action Runner. How can I mention that on my workflow ?

Azure DevOps - We used Agent.Name equals AgentName
Looking for similar actions.

Is this not good enough?

runs-on: [self-hosted, some-label]

(Each runner can have a unique label in addition to common labels.)