:doc:`IAM <../../iam>` / Client / update_role_description

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update_role_description
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.. py:method:: IAM.Client.update_role_description(**kwargs)

  

  Use `UpdateRole <https://docs.aws.amazon.com/IAM/latest/APIReference/API_UpdateRole.html>`__ instead.

   

  Modifies only the description of a role. This operation performs the same function as the ``Description`` parameter in the ``UpdateRole`` operation.

  

  See also: `AWS API Documentation <https://docs.aws.amazon.com/goto/WebAPI/iam-2010-05-08/UpdateRoleDescription>`_  


  **Request Syntax**
  ::

    response = client.update_role_description(
        RoleName='string',
        Description='string'
    )
    
  :type RoleName: string
  :param RoleName: **[REQUIRED]** 

    The name of the role that you want to modify.

    

  
  :type Description: string
  :param Description: **[REQUIRED]** 

    The new description that you want to apply to the specified role.

    

  
  
  :rtype: dict
  :returns: 
    
    **Response Syntax**

    
    ::

      {
          'Role': {
              'Path': 'string',
              'RoleName': 'string',
              'RoleId': 'string',
              'Arn': 'string',
              'CreateDate': datetime(2015, 1, 1),
              'AssumeRolePolicyDocument': 'string',
              'Description': 'string',
              'MaxSessionDuration': 123,
              'PermissionsBoundary': {
                  'PermissionsBoundaryType': 'PermissionsBoundaryPolicy',
                  'PermissionsBoundaryArn': 'string'
              },
              'Tags': [
                  {
                      'Key': 'string',
                      'Value': 'string'
                  },
              ],
              'RoleLastUsed': {
                  'LastUsedDate': datetime(2015, 1, 1),
                  'Region': 'string'
              }
          }
      }
      
    **Response Structure**

    

    - *(dict) --* 
      

      - **Role** *(dict) --* 

        A structure that contains details about the modified role.

        
        

        - **Path** *(string) --* 

          The path to the role. For more information about paths, see `IAM identifiers <https://docs.aws.amazon.com/IAM/latest/UserGuide/Using_Identifiers.html>`__ in the *IAM User Guide*.

          
        

        - **RoleName** *(string) --* 

          The friendly name that identifies the role.

          
        

        - **RoleId** *(string) --* 

          The stable and unique string identifying the role. For more information about IDs, see `IAM identifiers <https://docs.aws.amazon.com/IAM/latest/UserGuide/Using_Identifiers.html>`__ in the *IAM User Guide*.

          
        

        - **Arn** *(string) --* 

          The Amazon Resource Name (ARN) specifying the role. For more information about ARNs and how to use them in policies, see `IAM identifiers <https://docs.aws.amazon.com/IAM/latest/UserGuide/Using_Identifiers.html>`__ in the *IAM User Guide* guide.

          
        

        - **CreateDate** *(datetime) --* 

          The date and time, in `ISO 8601 date-time format <http://www.iso.org/iso/iso8601>`__, when the role was created.

          
        

        - **AssumeRolePolicyDocument** *(string) --* 

          The policy that grants an entity permission to assume the role.

          
        

        - **Description** *(string) --* 

          A description of the role that you provide.

          
        

        - **MaxSessionDuration** *(integer) --* 

          The maximum session duration (in seconds) for the specified role. Anyone who uses the CLI, or API to assume the role can specify the duration using the optional ``DurationSeconds`` API parameter or ``duration-seconds`` CLI parameter.

          
        

        - **PermissionsBoundary** *(dict) --* 

          The ARN of the policy used to set the permissions boundary for the role.

           

          For more information about permissions boundaries, see `Permissions boundaries for IAM identities <https://docs.aws.amazon.com/IAM/latest/UserGuide/access_policies_boundaries.html>`__ in the *IAM User Guide*.

          
          

          - **PermissionsBoundaryType** *(string) --* 

            The permissions boundary usage type that indicates what type of IAM resource is used as the permissions boundary for an entity. This data type can only have a value of ``Policy``.

            
          

          - **PermissionsBoundaryArn** *(string) --* 

            The ARN of the policy used to set the permissions boundary for the user or role.

            
      
        

        - **Tags** *(list) --* 

          A list of tags that are attached to the role. For more information about tagging, see `Tagging IAM resources <https://docs.aws.amazon.com/IAM/latest/UserGuide/id_tags.html>`__ in the *IAM User Guide*.

          
          

          - *(dict) --* 

            A structure that represents user-provided metadata that can be associated with an IAM resource. For more information about tagging, see `Tagging IAM resources <https://docs.aws.amazon.com/IAM/latest/UserGuide/id_tags.html>`__ in the *IAM User Guide*.

            
            

            - **Key** *(string) --* 

              The key name that can be used to look up or retrieve the associated value. For example, ``Department`` or ``Cost Center`` are common choices.

              
            

            - **Value** *(string) --* 

              The value associated with this tag. For example, tags with a key name of ``Department`` could have values such as ``Human Resources``, ``Accounting``, and ``Support``. Tags with a key name of ``Cost Center`` might have values that consist of the number associated with the different cost centers in your company. Typically, many resources have tags with the same key name but with different values.

              
        
      
        

        - **RoleLastUsed** *(dict) --* 

          Contains information about the last time that an IAM role was used. This includes the date and time and the Region in which the role was last used. Activity is only reported for the trailing 400 days. This period can be shorter if your Region began supporting these features within the last year. The role might have been used more than 400 days ago. For more information, see `Regions where data is tracked <https://docs.aws.amazon.com/IAM/latest/UserGuide/access_policies_access-advisor.html#access-advisor_tracking-period>`__ in the *IAM user Guide*.

          
          

          - **LastUsedDate** *(datetime) --* 

            The date and time, in  `ISO 8601 date-time format <http://www.iso.org/iso/iso8601>`__ that the role was last used.

             

            This field is null if the role has not been used within the IAM tracking period. For more information about the tracking period, see `Regions where data is tracked <https://docs.aws.amazon.com/IAM/latest/UserGuide/access_policies_access-advisor.html#access-advisor_tracking-period>`__ in the *IAM User Guide*.

            
          

          - **Region** *(string) --* 

            The name of the Amazon Web Services Region in which the role was last used.

            
      
    
  
  **Exceptions**
  
  *   :py:class:`IAM.Client.exceptions.NoSuchEntityException`

  
  *   :py:class:`IAM.Client.exceptions.UnmodifiableEntityException`

  
  *   :py:class:`IAM.Client.exceptions.ServiceFailureException`

  