diff --git a/moto/awslambda/models.py b/moto/awslambda/models.py
index a37a15e27..9fc41c11e 100644
--- a/moto/awslambda/models.py
+++ b/moto/awslambda/models.py
@@ -500,6 +500,11 @@ class LambdaStorage(object):
         except ValueError:
             return self._functions[name]['latest']
 
+    def list_versions_by_function(self, name):
+        if name not in self._functions:
+            return None
+        return [self._functions[name]['latest']]
+
     def get_arn(self, arn):
         return self._arns.get(arn, None)
 
@@ -607,6 +612,9 @@ class LambdaBackend(BaseBackend):
     def get_function(self, function_name, qualifier=None):
         return self._lambdas.get_function(function_name, qualifier)
 
+    def list_versions_by_function(self, function_name):
+        return self._lambdas.list_versions_by_function(function_name)
+
     def get_function_by_arn(self, function_arn):
         return self._lambdas.get_arn(function_arn)
 
diff --git a/moto/awslambda/responses.py b/moto/awslambda/responses.py
index 1a9a4df83..bcd2da903 100644
--- a/moto/awslambda/responses.py
+++ b/moto/awslambda/responses.py
@@ -52,7 +52,11 @@ class LambdaResponse(BaseResponse):
         self.setup_class(request, full_url, headers)
         if request.method == 'GET':
             # This is ListVersionByFunction
-            raise ValueError("Cannot handle request")
+
+            path = request.path if hasattr(request, 'path') else path_url(request.url)
+            function_name = path.split('/')[-2]
+            return self._list_versions_by_function(function_name)
+
         elif request.method == 'POST':
             return self._publish_function(request, full_url, headers)
         else:
@@ -151,6 +155,17 @@ class LambdaResponse(BaseResponse):
 
         return 200, {}, json.dumps(result)
 
+    def _list_versions_by_function(self, function_name):
+        result = {
+            'Versions': []
+        }
+
+        for fn in self.lambda_backend.list_versions_by_function(function_name):
+            json_data = fn.get_configuration()
+            result['Versions'].append(json_data)
+
+        return 200, {}, json.dumps(result)
+
     def _create_function(self, request, full_url, headers):
         try:
             fn = self.lambda_backend.create_function(self.json_body)
diff --git a/moto/kms/models.py b/moto/kms/models.py
index bb39d1b24..fb4040617 100644
--- a/moto/kms/models.py
+++ b/moto/kms/models.py
@@ -21,6 +21,7 @@ class Key(BaseModel):
         self.account_id = "0123456789012"
         self.key_rotation_status = False
         self.deletion_date = None
+        self.tags = {}
 
     @property
     def physical_resource_id(self):
@@ -35,7 +36,7 @@ class Key(BaseModel):
             "KeyMetadata": {
                 "AWSAccountId": self.account_id,
                 "Arn": self.arn,
-                "CreationDate": "2015-01-01 00:00:00",
+                "CreationDate": datetime.strftime(datetime.utcnow(), "%Y-%m-%dT%H:%M:%SZ"),
                 "Description": self.description,
                 "Enabled": self.enabled,
                 "KeyId": self.id,
@@ -84,6 +85,19 @@ class KmsBackend(BaseBackend):
         self.keys[key.id] = key
         return key
 
+    def update_key_description(self, key_id, description):
+        key = self.keys[self.get_key_id(key_id)]
+        key.description = description
+
+    def tag_resource(self, key_id, tags):
+        key = self.keys[self.get_key_id(key_id)]
+        key.tags = tags
+
+
+    def list_resource_tags(self, key_id):
+        key = self.keys[self.get_key_id(key_id)]
+        return key.tags
+
     def delete_key(self, key_id):
         if key_id in self.keys:
             if key_id in self.key_to_aliases:
diff --git a/moto/kms/responses.py b/moto/kms/responses.py
index 5883f51ec..b66ca267c 100644
--- a/moto/kms/responses.py
+++ b/moto/kms/responses.py
@@ -38,6 +38,28 @@ class KmsResponse(BaseResponse):
             policy, key_usage, description, self.region)
         return json.dumps(key.to_dict())
 
+    def update_key_description(self):
+        key_id = self.parameters.get('KeyId')
+        description = self.parameters.get('Description')
+
+        self.kms_backend.update_key_description(key_id,description)
+        return json.dumps(None)
+
+    def tag_resource(self):
+        key_id = self.parameters.get('KeyId')
+        tags = self.parameters.get('Tags')
+        self.kms_backend.tag_resource(key_id,tags)
+        return json.dumps({})
+
+    def list_resource_tags(self):
+        key_id = self.parameters.get('KeyId')
+        tags = self.kms_backend.list_resource_tags(key_id)
+        return json.dumps({
+            "Tags": tags,
+            "NextMarker": None,
+            "Truncated": False,
+        })
+
     def describe_key(self):
         key_id = self.parameters.get('KeyId')
         try:
diff --git a/tests/test_awslambda/test_lambda.py b/tests/test_awslambda/test_lambda.py
index 8ea9cc6fd..9c5120f51 100644
--- a/tests/test_awslambda/test_lambda.py
+++ b/tests/test_awslambda/test_lambda.py
@@ -819,3 +819,37 @@ def get_function_policy():
     assert isinstance(response['Policy'], str)
     res = json.loads(response['Policy'])
     assert res['Statement'][0]['Action'] == 'lambda:InvokeFunction'
+
+
+
+@mock_lambda
+@mock_s3
+def test_list_versions_by_function():
+    s3_conn = boto3.client('s3', 'us-west-2')
+    s3_conn.create_bucket(Bucket='test-bucket')
+
+    zip_content = get_test_zip_file2()
+    s3_conn.put_object(Bucket='test-bucket', Key='test.zip', Body=zip_content)
+    conn = boto3.client('lambda', 'us-west-2')
+
+    conn.create_function(
+        FunctionName='testFunction',
+        Runtime='python2.7',
+        Role='test-iam-role',
+        Handler='lambda_function.lambda_handler',
+        Code={
+            'S3Bucket': 'test-bucket',
+            'S3Key': 'test.zip',
+        },
+        Description='test lambda function',
+        Timeout=3,
+        MemorySize=128,
+        Publish=True,
+    )
+
+    conn.publish_version(FunctionName='testFunction')
+
+    versions = conn.list_versions_by_function(FunctionName='testFunction')
+
+    assert versions['Versions'][0]['FunctionArn'] == 'arn:aws:lambda:us-west-2:123456789012:function:testFunction:$LATEST'
+
diff --git a/tests/test_kms/test_kms.py b/tests/test_kms/test_kms.py
index 8bccae27a..520c7262c 100644
--- a/tests/test_kms/test_kms.py
+++ b/tests/test_kms/test_kms.py
@@ -717,3 +717,60 @@ def test_cancel_key_deletion():
     assert result["KeyMetadata"]["Enabled"] == False
     assert result["KeyMetadata"]["KeyState"] == 'Disabled'
     assert 'DeletionDate' not in result["KeyMetadata"]
+
+
+@mock_kms
+def test_update_key_description():
+    client = boto3.client('kms', region_name='us-east-1')
+    key = client.create_key(Description='old_description')
+    key_id =  key['KeyMetadata']['KeyId']
+
+    result = client.update_key_description(KeyId=key_id, Description='new_description')
+    assert 'ResponseMetadata' in result
+
+
+@mock_kms
+def test_tag_resource():
+    client = boto3.client('kms', region_name='us-east-1')
+    key = client.create_key(Description='cancel-key-deletion')
+    response = client.schedule_key_deletion(
+        KeyId=key['KeyMetadata']['KeyId']
+    )
+
+    keyid = response['KeyId']
+    response = client.tag_resource(
+        KeyId=keyid,
+        Tags=[
+            {
+                'TagKey': 'string',
+                'TagValue': 'string'
+            },
+        ]
+    )
+
+    # Shouldn't have any data, just header
+    assert len(response.keys()) == 1
+
+
+@mock_kms
+def test_list_resource_tags():
+    client = boto3.client('kms', region_name='us-east-1')
+    key = client.create_key(Description='cancel-key-deletion')
+    response = client.schedule_key_deletion(
+        KeyId=key['KeyMetadata']['KeyId']
+    )
+
+    keyid = response['KeyId']
+    response = client.tag_resource(
+        KeyId=keyid,
+        Tags=[
+            {
+                'TagKey': 'string',
+                'TagValue': 'string'
+            },
+        ]
+    )
+
+    response = client.list_resource_tags(KeyId=keyid)
+    assert response['Tags'][0]['TagKey'] == 'string'
+    assert response['Tags'][0]['TagValue'] == 'string'