Monsters are walking around without my permission, why?

I'm creating script to control an artificial intelligence, but the monsters are walking automatically. When I set the monster to patrol, then it patrols normally, but if I set it to not patrol, the monster is walking around randomly. I want the monster to stay still when the "patrollingCreature" option is set to "false".

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 using UnityEngine.Animations;
 using UnityEngine.AI;
 
 public class AIController : MonoBehaviour
 {
     [SerializeField] private GameObject player;
     [SerializeField] private Animator anim;
     [SerializeField] private Transform[] waypoints;
 
     private NavMeshAgent agent;
 
     private float distance;
     private bool isPlayerClose;
     private int destPoint = 0;
 
     public bool patrollingCreature = false;
     public bool thisCreatureAttack = false;
     public bool giveUpTheFight = true;
     public float maxHitPoints = 3f;
     public float currentHitPoints = 3f;
     public float fleeingHitPoints = 1f;
     public float maxAllowedDistance = 10f;
     public float attackRange = 5f;
     public float attackDamage = 10f;
     public float walkSpeed = 10.34f; //5.335f
     public float runSpeed = 31.04f;
 
     void Awake()
     {
         anim = GetComponent<Animator>();
         agent = GetComponent<NavMeshAgent>();
     }
 
     void Start()
     {
         // Disabling auto-braking allows for continuous movement
         // between points (ie, the agent doesn't slow down as it
         // approaches a destination point).
         agent.autoBraking = false;
     }
 
     void Update()
     {
         distance = Vector3.Distance(transform.position, player.transform.position);
 
         if (distance <= maxAllowedDistance)
         {
             isPlayerClose = true;
         }
         else
         {
             isPlayerClose = false;
         }
 
         if (isPlayerClose == true)
         {
             if (thisCreatureAttack == true)
             {
                 ToChase();
             }
             else
             {
                 if (giveUpTheFight == true)
                 {
                     if (currentHitPoints <= fleeingHitPoints)
                     {
                         ToRun();
                     }
                 }
             }
         }
         else
         {
             if (patrollingCreature == true)
             {
                 // Choose the next destination point when the agent gets
                 // close to the current one.
                 if (!agent.pathPending && agent.remainingDistance < 0.5f)
                 {
                     ToPatrol();
                 }
             }
             else
             {
                 ToRest();
             }
         }
     }
 
     private void ToRest()
     {
         agent.destination = transform.position;
         agent.velocity = Vector3.zero;
     }
 
     private void ToPatrol()
     {
         agent.speed = walkSpeed;
 
         // Returns if no points have been set up
         if (waypoints.Length == 0)
             return;
 
         // Set the agent to go to the currently selected destination.
         agent.destination = waypoints[destPoint].position;
 
         // Choose the next point in the array as the destination,
         // cycling to the start if necessary.
         destPoint = (destPoint + 1) % waypoints.Length;
     }
 
     private void ToLook()
     {
         transform.LookAt(player.transform.position);
     }
 
     private void ToChase()
     {
         ToLook();
 
         if (distance <= attackRange)
         {
             agent.velocity = Vector3.zero;
             ToAttack();
         }
         else
         {
             agent.speed = runSpeed;
             agent.destination = player.transform.position;
         }
     }
 
     private void ToAttack()
     {
         ///Attack the player every second, dealing damage determined on variables
     }
 
     private void ToRun()
     {
         ///Run in the opposite direction of the player. Stay at a distance of 20f
     }
 }