Kubernetes add Toleration from CLI - kubernetes

Question

I'm using the Oracle Cloud Infrastructure with Kubernetes and Docker. I've got the following pod:
$ kubectl describe pod $podname -n $namespace
Events:
Type Reason Age From Message
---- ------ ---- ---- -------
Warning FailedScheduling 19m default-scheduler 0/1 nodes are available: 1 node(s) had taint {nvidia.com/gpu: }, that the pod didn't tolerate.
Warning FailedScheduling 18m default-scheduler 0/1 nodes are available: 1 node(s) had taint {nvidia.com/gpu: }, that the pod didn't tolerate.
I want to add a toleration to this pod - is there a command to do so, without creating the pod config yaml file (as this pod is created by some other systems that I don't want to edit. I just want to add the toleration to resolve this issue.
Thanks.
====================
gpu-config.yaml
apiVersion: v1 # What version of the Kubernetes API to use
kind: Pod # What kind of object you want to create
metadata: # Data that helps uniquely identify the object, including a name, string, UID and optional namespace
name: nvidia-gpu-workload
spec: # What state you desire for the object, differs for every type of Kubernetes object.
restartPolicy: OnFailure
containers:
- name: cuda-vector-add
image: k8s.gcr/io/cuda-vector-add:v0.1
resources:
limits:
nvidia.com/gpu: 1
tolerations:
- key: "nvidia.com/gpu"
operator: "Equal"
effect: "NoSchedule"
# Update command
$ kubectl create -f ./gpu-config.yaml
# All this seems to do is create a pod by the name of nvidia-gpu-workload-v2, and it doesn't add these configurations to the pod that I require.
Just to note that this issue is occurring on a pod called hook-image-awaiter-5tq5 and I don't think I should re-create that pod with a different config as it seems to be configured by part of the system.