title: If I call the EC2 client's "describe_instances" function with no MaxResults, will it return all instances?
body: <p>If I call the boto3 EC2 client's <a href="https://boto3.amazonaws.com/v1/documentation/api/latest/reference/services/ec2.html#EC2.Client.describe_instances" rel="nofollow noreferrer">describe_instances</a> function with no MaxResults parameter, will it return <strong>all</strong> instances in the <em>initial</em> call?  There is a parameter that allows one to specify <code>MaxResults</code>, but it is not required.  If I don't specify this MaxResults parameter, will the response contain <em>all</em> instances or will it still chunk them into groups using the <code>NextToken</code> of the response?</p>
  
  <p>The documentation says </p>
  
  <blockquote>
    <p>"Describes the specified instances or all of AWS account's
    instances...If you do not specify instance IDs, Amazon EC2 returns
    information for all relevant instances."</p>
  </blockquote>
  
  <p>But it is not clear whether I still need to expect that things could be returned in chunks if my account has a lot of instances.  The MaxResults parameter can be set to "between 5 and 1000," which implies 1000 <em>may</em> be the default MaxResults.</p>