diff --git a/iopipe/contrib/eventinfo/event_types.py b/iopipe/contrib/eventinfo/event_types.py
index 394f7652..22d0f9b1 100644
--- a/iopipe/contrib/eventinfo/event_types.py
+++ b/iopipe/contrib/eventinfo/event_types.py
@@ -1,4 +1,4 @@
-from .util import collect_all_keys, get_value, has_key
+from .util import collect_all_keys, get_value, has_key, slugify
 
 
 class EventType(object):
@@ -9,6 +9,10 @@ class EventType(object):
     def __init__(self, event):
         self.event = event
 
+    @property
+    def slug(self):
+        return slugify(self.type)
+
     def has_required_keys(self):
         return all(has_key(self.event, key) for key in self.required_keys)
 
@@ -176,10 +180,12 @@ def has_required_keys(self):
 EVENT_TYPES = [AlexaSkill, ApiGateway, CloudFront, Firehose, Kinesis, S3, Scheduled, SNS]
 
 
-def log_for_event_type(event, log):
+def metrics_for_event_type(event, context):
     for EventType in EVENT_TYPES:
         event_type = EventType(event)
         if event_type.has_required_keys():
+            context.iopipe.label('@iopipe/event-info')
+            context.iopipe.label('@iopipe/%s' % event_type.slug)
             event_info = event_type.collect()
-            [log(k, v) for k, v in event_info.items()]
+            [context.iopipe.metric(k, v) for k, v in event_info.items()]
             break
diff --git a/iopipe/contrib/eventinfo/plugin.py b/iopipe/contrib/eventinfo/plugin.py
index 1c81a024..caa9882e 100644
--- a/iopipe/contrib/eventinfo/plugin.py
+++ b/iopipe/contrib/eventinfo/plugin.py
@@ -1,6 +1,6 @@
 from iopipe.plugins import Plugin
 
-from .event_types import log_for_event_type
+from .event_types import metrics_for_event_type
 
 
 class EventInfoPlugin(Plugin):
@@ -19,7 +19,7 @@ def pre_invoke(self, event, context):
         pass
 
     def post_invoke(self, event, context):
-        log_for_event_type(event, context.iopipe.log)
+        metrics_for_event_type(event, context)
 
     def pre_report(self, report):
         pass
diff --git a/iopipe/contrib/eventinfo/util.py b/iopipe/contrib/eventinfo/util.py
index ec7f52ec..c8168a47 100644
--- a/iopipe/contrib/eventinfo/util.py
+++ b/iopipe/contrib/eventinfo/util.py
@@ -1,4 +1,5 @@
 import jmespath
+import re
 
 # Caches previously seen parsers
 parsers = {}
@@ -49,3 +50,8 @@ def flatten(o, path=None):
 
     flatten(obj)
     return out
+
+
+def slugify(name):
+    s1 = re.sub('(.)([A-Z][a-z]+)', r'\1-\2', name)
+    return re.sub('([a-z0-9])([A-Z])', r'\1-\2', s1).lower()
diff --git a/iopipe/contrib/logger/plugin.py b/iopipe/contrib/logger/plugin.py
index 17281767..21b69771 100644
--- a/iopipe/contrib/logger/plugin.py
+++ b/iopipe/contrib/logger/plugin.py
@@ -73,16 +73,17 @@ def pre_report(self, report):
         pass
 
     def post_report(self, report):
-                signed_request = get_signed_request(report, '.log')
-                if signed_request and 'signedRequest' in signed_request:
-                    upload_log_data(signed_request['signedRequest'], self.handler.stream)
-                    if 'jwtAccess' in signed_request:
-                        plugin = next((p for p in report.plugins if p['name'] == self.name))
-                        if 'uploads' not in plugin:
-                            plugin['uploads'] = []
-                        plugin['uploads'].append(signed_request['jwtAccess'])
-                if self.use_tmp is True:
-                    self.handler.stream.close()
+        if self.handler.stream.tell() > 0:
+            signed_request = get_signed_request(report, '.log')
+            if signed_request and 'signedRequest' in signed_request:
+                upload_log_data(signed_request['signedRequest'], self.handler.stream)
+                if 'jwtAccess' in signed_request:
+                    plugin = next((p for p in report.plugins if p['name'] == self.name))
+                    if 'uploads' not in plugin:
+                        plugin['uploads'] = []
+                    plugin['uploads'].append(signed_request['jwtAccess'])
+        if self.use_tmp is True:
+            self.handler.stream.close()
 
     def __del__(self):
         if self.use_tmp and self.handler and self.handler.stream:
diff --git a/iopipe/contrib/logger/wrapper.py b/iopipe/contrib/logger/wrapper.py
index ae4a7688..00fc8041 100644
--- a/iopipe/contrib/logger/wrapper.py
+++ b/iopipe/contrib/logger/wrapper.py
@@ -7,4 +7,9 @@ def __call__(self, key, value):
         self.context.iopipe.metric(key, value)
 
     def __getattr__(self, name):
+        self.context.iopipe.label('@iopipe/logs')
+        if name in ['warn', 'warning']:
+            self.context.iopipe.label('@iopipe/logs-warning')
+        if name in ['critical', 'error', 'exception']:
+            self.context.iopipe.label('@iopipe/logs-error')
         return getattr(self.logger, name)
diff --git a/iopipe/contrib/profiler/plugin.py b/iopipe/contrib/profiler/plugin.py
index 0a26d013..25fb8aa6 100644
--- a/iopipe/contrib/profiler/plugin.py
+++ b/iopipe/contrib/profiler/plugin.py
@@ -56,6 +56,7 @@ def post_invoke(self, event, context):
 
     def pre_report(self, report):
         if self.profile is not None:
+            self.context.iopipe.label('@iopipe/profile')
             with tempfile.NamedTemporaryFile() as stats_file:
                 self.profile.dump_stats(stats_file.name)
                 signed_request = get_signed_request(report, '.cprofile')
diff --git a/iopipe/contrib/trace/marker.py b/iopipe/contrib/trace/marker.py
index 911b12c3..0654d039 100644
--- a/iopipe/contrib/trace/marker.py
+++ b/iopipe/contrib/trace/marker.py
@@ -1,6 +1,7 @@
 class Marker(object):
-    def __init__(self, timeline):
+    def __init__(self, timeline, context):
         self.timeline = timeline
+        self.context = context
         self.contexts = []
 
     def __call__(self, name):
@@ -19,6 +20,7 @@ def __exit__(self, type, value, traceback):
 
     def start(self, name):
         self.timeline.mark('start:%s' % name)
+        self.context.iopipe.label('@iopipe/trace')
 
     def end(self, name):
         self.timeline.mark('end:%s' % name)
diff --git a/iopipe/contrib/trace/plugin.py b/iopipe/contrib/trace/plugin.py
index e0f1b8a7..6531a608 100644
--- a/iopipe/contrib/trace/plugin.py
+++ b/iopipe/contrib/trace/plugin.py
@@ -22,7 +22,7 @@ def post_setup(self, iopipe):
         pass
 
     def pre_invoke(self, event, context):
-        context.iopipe.register('mark', Marker(self.timeline))
+        context.iopipe.register('mark', Marker(self.timeline, context))
 
     def post_invoke(self, event, context):
         context.iopipe.unregister('mark')
diff --git a/iopipe/report.py b/iopipe/report.py
index d5859381..3ec1b13b 100644
--- a/iopipe/report.py
+++ b/iopipe/report.py
@@ -71,7 +71,9 @@ def __init__(self, config, context):
             'timestamp': int(time.time() * 1000),
         }
 
-        constants.COLDSTART = False
+        if constants.COLDSTART is True:
+            constants.COLDSTART = False
+            self.labels.add('@iopipe/coldstart')
 
     def extract_context_data(self):
         """
@@ -110,9 +112,12 @@ def retain_error(self, error, frame=None):
 
         :param error: The error exception to add to the report.
         """
-        stack = traceback.format_exc()
-        if frame is not None:
+        if frame is None:
+            stack = traceback.format_exc()
+            self.labels.add('@iopipe/error')
+        else:
             stack = '\n'.join(traceback.format_stack(frame))
+            self.labels.add('@iopipe/timeout')
         details = {
             'name': type(error).__name__,
             'message': '{}'.format(error),
@@ -130,6 +135,9 @@ def prepare(self, error=None, frame=None):
         if error:
             self.retain_error(error, frame)
 
+        if self.custom_metrics:
+            self.labels.add('@iopipe/metrics')
+
         self.report['environment']['host']['boot_id'] = system.read_bootid()
 
         # convert labels to list for sending
diff --git a/tests/conftest.py b/tests/conftest.py
index 2caadf82..899c5bb6 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -1,4 +1,5 @@
 import json
+import mock
 import numbers
 import time
 from decimal import Decimal
@@ -24,6 +25,7 @@ def __init__(self, name='handler', version='$LATEST'):
         self.function_version = version
         self.invoked_function_arn = 'arn:aws:lambda:us-east-1:1:function:%s:%s' % (name, version)
         self.remaining_time_in_millis = float('inf')
+        self.iopipe = mock.Mock()
 
     def get_remaining_time_in_millis(self):
         return self.remaining_time_in_millis
@@ -48,9 +50,10 @@ def _assert_valid_schema(obj, schema=None, path=None, optional_fields=None):
     if not optional_fields:
         optional_fields = []
 
-    for key in obj:
-        key_path = '.'.join(path + [key])
-        assert key in schema, "%s not in schema" % key_path
+    if isinstance(obj, dict):
+        for key in obj:
+            key_path = '.'.join(path + [key])
+            assert key in schema, "%s not in schema" % key_path
 
     for key in schema:
         key_path = '.'.join(path + [key])
@@ -65,7 +68,8 @@ def _assert_valid_schema(obj, schema=None, path=None, optional_fields=None):
             _assert_valid_schema(obj[key], schema[key], path + [key], optional_fields)
         elif isinstance(obj[key], list):
             for item in obj[key]:
-                _assert_valid_schema(item, schema[key][0], path + [key], optional_fields)
+                if isinstance(item, dict):
+                    _assert_valid_schema(item, schema[key][0], path + [key], optional_fields)
         elif schema[key] == 'b':
             assert isinstance(obj[key], bool), '%s not a boolean' % key_path
         elif schema[key] == 'i':
diff --git a/tests/contrib/eventinfo/test_plugin.py b/tests/contrib/eventinfo/test_plugin.py
index 5db8e2ab..1cf21e16 100644
--- a/tests/contrib/eventinfo/test_plugin.py
+++ b/tests/contrib/eventinfo/test_plugin.py
@@ -15,6 +15,8 @@ def test__eventinfo_plugin__apigw(mock_send_report, handler_with_eventinfo, even
 
     assert any([m['name'] == '@iopipe/event-info.eventType' for m in metrics])
     assert len(metrics) == 10
+    assert '@iopipe/event-info' in iopipe.report.labels
+    assert '@iopipe/api-gateway' in iopipe.report.labels
 
     event_type = [m for m in metrics if m['name'] == '@iopipe/event-info.eventType']
     assert len(event_type) == 1
diff --git a/tests/contrib/logger/test_plugin.py b/tests/contrib/logger/test_plugin.py
index 9727801b..6a15840e 100644
--- a/tests/contrib/logger/test_plugin.py
+++ b/tests/contrib/logger/test_plugin.py
@@ -44,6 +44,7 @@ def test__logger_plugin(mock_send_report, mock_get_signed_request, mock_upload_l
         json_msg = json.loads(line)
         assert 'timestamp' in json_msg
         assert isinstance(datetime.strptime(json_msg['timestamp'], '%Y-%m-%d %H:%M:%S.%f'), datetime)
+        assert '@iopipe/logs' in iopipe.report.labels
 
 
 @mock.patch('iopipe.contrib.logger.plugin.upload_log_data', autospec=True)
diff --git a/tests/contrib/profiler/test_plugin.py b/tests/contrib/profiler/test_plugin.py
index 3627247c..52843192 100644
--- a/tests/contrib/profiler/test_plugin.py
+++ b/tests/contrib/profiler/test_plugin.py
@@ -25,3 +25,4 @@ def test__profiler_plugin(mock_send_report, mock_get_signed_request, mock_upload
 
     plugin = next((p for p in iopipe.report.plugins if p['name'] == 'profiler'))
     assert plugin['uploads'][0] == 'foobar'
+    assert '@iopipe/profile' in iopipe.report.labels
diff --git a/tests/contrib/trace/conftest.py b/tests/contrib/trace/conftest.py
index a2713b15..d4295124 100644
--- a/tests/contrib/trace/conftest.py
+++ b/tests/contrib/trace/conftest.py
@@ -51,8 +51,8 @@ def _handler(event, context):
 
 
 @pytest.fixture
-def marker(timeline):
-    return Marker(timeline)
+def marker(timeline, mock_context):
+    return Marker(timeline, mock_context)
 
 
 @pytest.fixture
diff --git a/tests/contrib/trace/test_plugin.py b/tests/contrib/trace/test_plugin.py
index 6a5cbbca..20005328 100644
--- a/tests/contrib/trace/test_plugin.py
+++ b/tests/contrib/trace/test_plugin.py
@@ -11,6 +11,7 @@ def test__trace_plugin(mock_send_report, handler_with_trace, mock_context):
 
     assert len(iopipe.report.report['performanceEntries']) == 3
     assert any([e['name'] == 'measure:foo' for e in iopipe.report.report['performanceEntries']])
+    assert '@iopipe/trace' in iopipe.report.labels
 
 
 @mock.patch('iopipe.report.send_report', autospec=True)
diff --git a/tests/test_agent.py b/tests/test_agent.py
index a5ea398b..996eb0da 100644
--- a/tests/test_agent.py
+++ b/tests/test_agent.py
@@ -11,9 +11,11 @@ def test_coldstarts(mock_send_report, handler, mock_context, monkeypatch):
 
     handler(None, mock_context)
     assert iopipe.report.report['coldstart'] is True
+    assert '@iopipe/coldstart' in iopipe.report.labels
 
     handler(None, mock_context)
     assert iopipe.report.report['coldstart'] is False
+    assert '@iopipe/coldstart' not in iopipe.report.labels
 
 
 @mock.patch('iopipe.report.send_report', autospec=True)
@@ -43,6 +45,7 @@ def test_custom_metrics(mock_send_report, handler_with_events, mock_context):
     assert len(iopipe.report.custom_metrics) == 7
     # Decimals are converted to strings
     assert iopipe.report.custom_metrics[6]['s'] == '12.300000000000000710542735760100185871124267578125'
+    assert '@iopipe/metrics' in iopipe.report.labels
 
 
 @mock.patch('iopipe.report.send_report', autospec=True)
@@ -67,6 +70,7 @@ def test_erroring(mock_send_report, handler_that_errors, mock_context):
     assert iopipe.report.report['errors']['name'] == 'ValueError'
     assert iopipe.report.report['errors']['message'] == 'Behold, a value error'
     assert isinstance(iopipe.report.report['errors']['stack'], str)
+    assert '@iopipe/error' in iopipe.report.labels
 
 
 @mock.patch('iopipe.report.send_report', autospec=True)
@@ -83,6 +87,7 @@ def test_timeouts(mock_send_report, handler_that_timeouts, mock_context):
     assert iopipe.report.report['errors']['message'] == 'Timeout Exceeded.'
     assert iopipe.report.report['errors']['name'] == 'TimeoutError'
     assert isinstance(iopipe.report.report['errors']['stack'], str)
+    assert '@iopipe/timeout' in iopipe.report.labels
 
 
 @mock.patch('iopipe.report.send_report', autospec=True)