diff --git a/services/telemetryrouter/oas_commit b/services/telemetryrouter/oas_commit
index 9df10dbb7..8ae9a8db5 100644
--- a/services/telemetryrouter/oas_commit
+++ b/services/telemetryrouter/oas_commit
@@ -1 +1 @@
-704bc151ecb2fa86e14ed14e7066163b24c08138
+e9fe931e91e0b8f067d5c12518398a52062ca794
diff --git a/services/telemetryrouter/src/stackit/telemetryrouter/models/access_token_base_request.py b/services/telemetryrouter/src/stackit/telemetryrouter/models/access_token_base_request.py
index 90dd8e29b..387cf27ea 100644
--- a/services/telemetryrouter/src/stackit/telemetryrouter/models/access_token_base_request.py
+++ b/services/telemetryrouter/src/stackit/telemetryrouter/models/access_token_base_request.py
@@ -40,6 +40,19 @@ class AccessTokenBaseRequest(BaseModel):
     )
     __properties: ClassVar[List[str]] = ["description", "displayName", "ttl"]
 
+    @field_validator("description")
+    def description_validate_regular_expression(cls, value):
+        """Validates the regular expression"""
+        if value is None:
+            return value
+
+        if not isinstance(value, str):
+            value = str(value)
+
+        if not re.match(r"^([a-zA-Z0-9][a-zA-Z0-9 \-]*)?$", value):
+            raise ValueError(r"must validate the regular expression /^([a-zA-Z0-9][a-zA-Z0-9 \-]*)?$/")
+        return value
+
     @field_validator("display_name")
     def display_name_validate_regular_expression(cls, value):
         """Validates the regular expression"""
diff --git a/services/telemetryrouter/src/stackit/telemetryrouter/models/access_token_base_response.py b/services/telemetryrouter/src/stackit/telemetryrouter/models/access_token_base_response.py
index 319aca477..5521a2c2b 100644
--- a/services/telemetryrouter/src/stackit/telemetryrouter/models/access_token_base_response.py
+++ b/services/telemetryrouter/src/stackit/telemetryrouter/models/access_token_base_response.py
@@ -46,6 +46,19 @@ class AccessTokenBaseResponse(BaseModel):
     status: StrictStr
     __properties: ClassVar[List[str]] = ["creatorId", "description", "displayName", "expirationTime", "id", "status"]
 
+    @field_validator("description")
+    def description_validate_regular_expression(cls, value):
+        """Validates the regular expression"""
+        if value is None:
+            return value
+
+        if not isinstance(value, str):
+            value = str(value)
+
+        if not re.match(r"^([a-zA-Z0-9][a-zA-Z0-9 \-]*)?$", value):
+            raise ValueError(r"must validate the regular expression /^([a-zA-Z0-9][a-zA-Z0-9 \-]*)?$/")
+        return value
+
     @field_validator("display_name")
     def display_name_validate_regular_expression(cls, value):
         """Validates the regular expression"""
diff --git a/services/telemetryrouter/src/stackit/telemetryrouter/models/create_access_token_payload.py b/services/telemetryrouter/src/stackit/telemetryrouter/models/create_access_token_payload.py
index d2a415b06..5aaed1d4c 100644
--- a/services/telemetryrouter/src/stackit/telemetryrouter/models/create_access_token_payload.py
+++ b/services/telemetryrouter/src/stackit/telemetryrouter/models/create_access_token_payload.py
@@ -40,6 +40,19 @@ class CreateAccessTokenPayload(BaseModel):
     )
     __properties: ClassVar[List[str]] = ["description", "displayName", "ttl"]
 
+    @field_validator("description")
+    def description_validate_regular_expression(cls, value):
+        """Validates the regular expression"""
+        if value is None:
+            return value
+
+        if not isinstance(value, str):
+            value = str(value)
+
+        if not re.match(r"^([a-zA-Z0-9][a-zA-Z0-9 \-]*)?$", value):
+            raise ValueError(r"must validate the regular expression /^([a-zA-Z0-9][a-zA-Z0-9 \-]*)?$/")
+        return value
+
     @field_validator("display_name")
     def display_name_validate_regular_expression(cls, value):
         """Validates the regular expression"""
diff --git a/services/telemetryrouter/src/stackit/telemetryrouter/models/create_access_token_response.py b/services/telemetryrouter/src/stackit/telemetryrouter/models/create_access_token_response.py
index 289c25f83..67df071f4 100644
--- a/services/telemetryrouter/src/stackit/telemetryrouter/models/create_access_token_response.py
+++ b/services/telemetryrouter/src/stackit/telemetryrouter/models/create_access_token_response.py
@@ -55,6 +55,19 @@ class CreateAccessTokenResponse(BaseModel):
         "accessToken",
     ]
 
+    @field_validator("description")
+    def description_validate_regular_expression(cls, value):
+        """Validates the regular expression"""
+        if value is None:
+            return value
+
+        if not isinstance(value, str):
+            value = str(value)
+
+        if not re.match(r"^([a-zA-Z0-9][a-zA-Z0-9 \-]*)?$", value):
+            raise ValueError(r"must validate the regular expression /^([a-zA-Z0-9][a-zA-Z0-9 \-]*)?$/")
+        return value
+
     @field_validator("display_name")
     def display_name_validate_regular_expression(cls, value):
         """Validates the regular expression"""
diff --git a/services/telemetryrouter/src/stackit/telemetryrouter/models/destination_response.py b/services/telemetryrouter/src/stackit/telemetryrouter/models/destination_response.py
index c6b9a703b..09baf467c 100644
--- a/services/telemetryrouter/src/stackit/telemetryrouter/models/destination_response.py
+++ b/services/telemetryrouter/src/stackit/telemetryrouter/models/destination_response.py
@@ -74,6 +74,19 @@ def credential_type_validate_enum(cls, value):
             raise ValueError("must be one of enum values ('bearerToken', 'basicAuth', 'accessKey')")
         return value
 
+    @field_validator("description")
+    def description_validate_regular_expression(cls, value):
+        """Validates the regular expression"""
+        if value is None:
+            return value
+
+        if not isinstance(value, str):
+            value = str(value)
+
+        if not re.match(r"^([a-zA-Z0-9][a-zA-Z0-9 \-]*)?$", value):
+            raise ValueError(r"must validate the regular expression /^([a-zA-Z0-9][a-zA-Z0-9 \-]*)?$/")
+        return value
+
     @field_validator("display_name")
     def display_name_validate_regular_expression(cls, value):
         """Validates the regular expression"""
diff --git a/services/telemetryrouter/src/stackit/telemetryrouter/models/get_access_token_response.py b/services/telemetryrouter/src/stackit/telemetryrouter/models/get_access_token_response.py
index 9053aa434..8662da0be 100644
--- a/services/telemetryrouter/src/stackit/telemetryrouter/models/get_access_token_response.py
+++ b/services/telemetryrouter/src/stackit/telemetryrouter/models/get_access_token_response.py
@@ -46,6 +46,19 @@ class GetAccessTokenResponse(BaseModel):
     status: StrictStr
     __properties: ClassVar[List[str]] = ["creatorId", "description", "displayName", "expirationTime", "id", "status"]
 
+    @field_validator("description")
+    def description_validate_regular_expression(cls, value):
+        """Validates the regular expression"""
+        if value is None:
+            return value
+
+        if not isinstance(value, str):
+            value = str(value)
+
+        if not re.match(r"^([a-zA-Z0-9][a-zA-Z0-9 \-]*)?$", value):
+            raise ValueError(r"must validate the regular expression /^([a-zA-Z0-9][a-zA-Z0-9 \-]*)?$/")
+        return value
+
     @field_validator("display_name")
     def display_name_validate_regular_expression(cls, value):
         """Validates the regular expression"""
diff --git a/services/telemetryrouter/src/stackit/telemetryrouter/models/telemetry_router_response.py b/services/telemetryrouter/src/stackit/telemetryrouter/models/telemetry_router_response.py
index 934467361..7c4e59b1c 100644
--- a/services/telemetryrouter/src/stackit/telemetryrouter/models/telemetry_router_response.py
+++ b/services/telemetryrouter/src/stackit/telemetryrouter/models/telemetry_router_response.py
@@ -59,6 +59,19 @@ def creation_time_change_year_zero_to_one(cls, value):
                 return "0001" + value[4:]  # Take "0001" and append the rest of the string
         return value
 
+    @field_validator("description")
+    def description_validate_regular_expression(cls, value):
+        """Validates the regular expression"""
+        if value is None:
+            return value
+
+        if not isinstance(value, str):
+            value = str(value)
+
+        if not re.match(r"^([a-zA-Z0-9][a-zA-Z0-9 \-]*)?$", value):
+            raise ValueError(r"must validate the regular expression /^([a-zA-Z0-9][a-zA-Z0-9 \-]*)?$/")
+        return value
+
     @field_validator("display_name")
     def display_name_validate_regular_expression(cls, value):
         """Validates the regular expression"""
diff --git a/services/telemetryrouter/src/stackit/telemetryrouter/models/update_access_token_payload.py b/services/telemetryrouter/src/stackit/telemetryrouter/models/update_access_token_payload.py
index 7e7a10040..28ff31807 100644
--- a/services/telemetryrouter/src/stackit/telemetryrouter/models/update_access_token_payload.py
+++ b/services/telemetryrouter/src/stackit/telemetryrouter/models/update_access_token_payload.py
@@ -34,6 +34,19 @@ class UpdateAccessTokenPayload(BaseModel):
     )
     __properties: ClassVar[List[str]] = ["description", "displayName"]
 
+    @field_validator("description")
+    def description_validate_regular_expression(cls, value):
+        """Validates the regular expression"""
+        if value is None:
+            return value
+
+        if not isinstance(value, str):
+            value = str(value)
+
+        if not re.match(r"^([a-zA-Z0-9][a-zA-Z0-9 \-]*)?$", value):
+            raise ValueError(r"must validate the regular expression /^([a-zA-Z0-9][a-zA-Z0-9 \-]*)?$/")
+        return value
+
     @field_validator("display_name")
     def display_name_validate_regular_expression(cls, value):
         """Validates the regular expression"""
diff --git a/services/telemetryrouter/src/stackit/telemetryrouter/models/update_access_token_response.py b/services/telemetryrouter/src/stackit/telemetryrouter/models/update_access_token_response.py
index e82063312..3aa7ec4d7 100644
--- a/services/telemetryrouter/src/stackit/telemetryrouter/models/update_access_token_response.py
+++ b/services/telemetryrouter/src/stackit/telemetryrouter/models/update_access_token_response.py
@@ -46,6 +46,19 @@ class UpdateAccessTokenResponse(BaseModel):
     status: StrictStr
     __properties: ClassVar[List[str]] = ["creatorId", "description", "displayName", "expirationTime", "id", "status"]
 
+    @field_validator("description")
+    def description_validate_regular_expression(cls, value):
+        """Validates the regular expression"""
+        if value is None:
+            return value
+
+        if not isinstance(value, str):
+            value = str(value)
+
+        if not re.match(r"^([a-zA-Z0-9][a-zA-Z0-9 \-]*)?$", value):
+            raise ValueError(r"must validate the regular expression /^([a-zA-Z0-9][a-zA-Z0-9 \-]*)?$/")
+        return value
+
     @field_validator("display_name")
     def display_name_validate_regular_expression(cls, value):
         """Validates the regular expression"""
diff --git a/services/telemetryrouter/uv.lock b/services/telemetryrouter/uv.lock
index 5cbc88cef..21a1c38e6 100644
--- a/services/telemetryrouter/uv.lock
+++ b/services/telemetryrouter/uv.lock
@@ -1057,7 +1057,7 @@ dev = [
 
 [[package]]
 name = "stackit-telemetryrouter"
-version = "0.4.0"
+version = "0.5.0"
 source = { editable = "." }
 dependencies = [
     { name = "pydantic" },