diff --git a/libs/filonov/filonov/entrypoints/server.py b/libs/filonov/filonov/entrypoints/server.py
index b72096f..94b6f74 100644
--- a/libs/filonov/filonov/entrypoints/server.py
+++ b/libs/filonov/filonov/entrypoints/server.py
@@ -11,7 +11,7 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
-"""Provides HTTP endpoint for media similarity requests."""
+"""Provides HTTP endpoint for filonov requests."""
 
 # pylint: disable=C0330, g-bad-import-order, g-multiple-import
 import os
@@ -41,10 +41,13 @@
 
 
 class CreativeMapPostRequest(pydantic.BaseModel):
-  """Specifies structure of request for tagging media.
+  """Specifies structure of request for returning creative map.
 
   Attributes:
-    media_paths: Identifiers or media to cluster (file names or links).
+    source: Source of getting data for creative map.
+    media_type: Type of media to get.
+    input_parameters: Parameters to get data from the source.
+    tagger: Type of tagger to use.
     normalize: Whether to apply normalization threshold.
   """
 
@@ -59,7 +62,7 @@ class CreativeMapPostRequest(pydantic.BaseModel):
 async def generate_creative_map(
   request: CreativeMapPostRequest,
 ) -> filonov.creative_map.CreativeMapJson:
-  """Performs media clustering."""
+  """Generates Json with creative map data."""
   input_service = filonov.MediaInputService(request.source)
   media_info, context = input_service.generate_media_info(
     request.media_type, request.input_parameters
diff --git a/libs/filonov/filonov/inputs/input_service.py b/libs/filonov/filonov/inputs/input_service.py
index f017276..ea039e8 100644
--- a/libs/filonov/filonov/inputs/input_service.py
+++ b/libs/filonov/filonov/inputs/input_service.py
@@ -16,7 +16,7 @@
 
 """Module responsible for extracting media dimensions and metrics."""
 
-from typing import Literal
+from typing import Literal, get_args
 
 from filonov.inputs import google_ads, interfaces, youtube
 
@@ -24,11 +24,20 @@
 Context = dict[str, str]
 
 
+class MediaInputServiceError(Exception):
+  """Base exception for MediaInputService."""
+
+
 class MediaInputService:
   """Extracts media information from a specified source."""
 
-  def __init__(self, source: InputSource) -> None:
+  def __init__(self, source: InputSource = 'googleads') -> None:
     """Initializes InputService."""
+    if source not in get_args(InputSource):
+      raise MediaInputServiceError(
+        f'Incorrect source: {source}. Only {get_args(InputSource)} '
+        'are supported.'
+      )
     self.source = source
 
   def generate_media_info(
@@ -46,10 +55,15 @@ def generate_media_info(
 
     Returns:
       Tuple with mapping between media identifiers and media info and a context.
+
+    Raises:
+      MediaInputServiceError: When incomplete input parameters are supplied.
     """
     if self.source == 'youtube':
       if not (channel := input_parameters.get('channel')):
-        raise ValueError
+        raise MediaInputServiceError(
+          'Missing required argument `channel` for source `youtube`'
+        )
       context = {'channel': channel}
       return (
         youtube.ExtraInfoFetcher(channel).generate_extra_info(),
@@ -57,7 +71,10 @@ def generate_media_info(
       )
     if self.source == 'file':
       if 'performance_results_path' not in input_parameters:
-        raise ValueError
+        raise MediaInputServiceError(
+          'Missing required argument `performance_results_path` '
+          'for source `file`'
+        )
       return (
         google_ads.from_file(
           media_type=media_type,
@@ -66,21 +83,19 @@ def generate_media_info(
         ),
         {},
       )
-    if self.source == 'googleads':
-      if 'ads_config_path' in input_parameters:
-        ads_config = input_parameters.pop('ads_config_path')
-      if 'account' in input_parameters:
-        accounts = input_parameters.pop('account')
-      fetcher = google_ads.ExtraInfoFetcher(
-        accounts=accounts, ads_config=ads_config
-      )
-      fetching_request = google_ads.FetchingRequest(
-        media_type=media_type,
-        **input_parameters,
-      )
-      context = {**fetching_request.to_dict(), 'account': accounts}
-      return (
-        fetcher.generate_extra_info(fetching_request, with_size_base),
-        context,
-      )
-    raise ValueError
+    if 'ads_config_path' in input_parameters:
+      ads_config = input_parameters.pop('ads_config_path')
+    if 'account' in input_parameters:
+      accounts = input_parameters.pop('account')
+    fetcher = google_ads.ExtraInfoFetcher(
+      accounts=accounts, ads_config=ads_config
+    )
+    fetching_request = google_ads.FetchingRequest(
+      media_type=media_type,
+      **input_parameters,
+    )
+    context = {**fetching_request.to_dict(), 'account': accounts}
+    return (
+      fetcher.generate_extra_info(fetching_request, with_size_base),
+      context,
+    )
diff --git a/ui/creative-maps/package-lock.json b/ui/creative-maps/package-lock.json
index c8727a5..87bedb7 100644
--- a/ui/creative-maps/package-lock.json
+++ b/ui/creative-maps/package-lock.json
@@ -7679,15 +7679,16 @@
       }
     },
     "node_modules/nanoid": {
-      "version": "3.3.7",
-      "resolved": "https://registry.npmjs.org/nanoid/-/nanoid-3.3.7.tgz",
-      "integrity": "sha512-eSRppjcPIatRIMC1U6UngP8XFcz8MQWGQdt1MTBQ7NaAmvXDfvNxbvWV3x2y6CdEUciCSsDHDQZbhYaB8QEo2g==",
+      "version": "3.3.8",
+      "resolved": "https://registry.npmjs.org/nanoid/-/nanoid-3.3.8.tgz",
+      "integrity": "sha512-WNLf5Sd8oZxOm+TzppcYk8gVOgP+l58xNy58D0nbUnOxOWRWvlcCV4kUF7ltmI6PsrLl/BgKEyS4mqsGChFN0w==",
       "funding": [
         {
           "type": "github",
           "url": "https://github.com/sponsors/ai"
         }
       ],
+      "license": "MIT",
       "bin": {
         "nanoid": "bin/nanoid.cjs"
       },
@@ -10602,10 +10603,11 @@
       }
     },
     "node_modules/vite": {
-      "version": "5.4.8",
-      "resolved": "https://registry.npmjs.org/vite/-/vite-5.4.8.tgz",
-      "integrity": "sha512-FqrItQ4DT1NC4zCUqMB4c4AZORMKIa0m8/URVCZ77OZ/QSNeJ54bU1vrFADbDsuwfIPcgknRkmqakQcgnL4GiQ==",
+      "version": "5.4.14",
+      "resolved": "https://registry.npmjs.org/vite/-/vite-5.4.14.tgz",
+      "integrity": "sha512-EK5cY7Q1D8JNhSaPKVK4pwBFvaTmZxEnoKXLG/U9gmdDcihQGNzFlgIvaxezFR4glP1LsuiedwMBqCXH3wZccA==",
       "dev": true,
+      "license": "MIT",
       "dependencies": {
         "esbuild": "^0.21.3",
         "postcss": "^8.4.43",