Besides the normal yaml template parameter wrapped by bracket, a valid parameter can also be manipulated by filters appended with dot . or functions appended with vertical bar |.

test the following template will generate command like Running command: kubectl exec -n test-ns dnsutils -- nslookup kubernetes.default.svc.cluster.local

      - name: "exec_on_dns_debug_pod"
        description: "Run a command inside the DNS debugging pod"
        command: "kubectl exec -n {{namespace|trim}} {{ pod_name }} -- {{ command.strip(\"'\") }}"

NOTE, {{namespace|trim}} has no practical use, and is for test only.