Yaml Pipeline: Add condition for each environment to use a specific agent from the agent pool

I need to add the condition for each environment to use specific Agent.Name. For dev and sandbox environment it should be using the same Agent.Name "agent-dev"

Yaml code is shown below. How can I write the condition for dev and sandbox environment to use the same Agent.Name "agent-dev"?

pool:
  vmImage: 'linux'

trigger: none

parameters:
  - name: env
    values:
      - dev
      - sandbox
      - int
      - preprod
      - prod
    type: string
    displayName: "Environment"

stages:
  - stage: Configure${{ upper(parameters.env) }}
    displayName: "Configure Resources in ${{parameters.env}} 

    jobs:
      - job: Configure_${{ upper(parameters.env) }}
        pool:
          name: Project-Linuxpool
          demands:
            - Agent.Name -equals agent-$(environment)

How can I write the condition for dev and sandbox environment to use the same Agent.Name "agent-dev"?

You can use the if condition and the Or expression to let the dev and sandbox env to use the same agent.

Here is an example:

trigger: none

parameters:
  - name: env
    values:
      - dev
      - sandbox
      - int
      - preprod
      - prod
    type: string
    displayName: "Environment"

stages:
  - stage: Configure${{ upper(parameters.env) }}
    displayName: "Configure Resources in ${{parameters.env}}"

    jobs:
      - job: "Configure_${{ upper(parameters.env) }}"
        pool:
          name: Project-Linuxpool
          ${{if or(eq( parameters.env, 'dev'), eq( parameters.env,'sandbox') )}}:
           demands:
             - Agent.Name -equals agent-dev
          ${{ else }}:
           demands:
             - Agent.Name -equals agent-${{parameters.env}}      

When you select dev or sandbox in env parameters, it will use the dev agent. Or it will select the agent name based on the env parameters value.