diff --git a/api/src/api/v1/auth.py b/api/src/api/v1/auth.py
index a336382..a5b8d2e 100644
--- a/api/src/api/v1/auth.py
+++ b/api/src/api/v1/auth.py
@@ -3,8 +3,8 @@ from sqlalchemy.ext.asyncio import AsyncSession
 
 from src.core.config import settings
 from src.core.security import (
+    decode_keycloak_token,
     email_from_keycloak_payload,
-    inspect_keycloak_token,
     normalize_bearer_token,
 )
 from src.db.session import get_db
@@ -73,14 +73,11 @@ else:
                 detail=_PROD_TOKEN_REQUIRED,
                 headers={"WWW-Authenticate": "Bearer"},
             )
-        payload, reason = inspect_keycloak_token(raw_token)
+        payload = decode_keycloak_token(raw_token)
         if payload is None:
-            detail = _PROD_TOKEN_INVALID
-            if reason:
-                detail = f"{_PROD_TOKEN_INVALID}: {reason}"
             raise HTTPException(
                 status_code=status.HTTP_401_UNAUTHORIZED,
-                detail=detail,
+                detail=_PROD_TOKEN_INVALID,
                 headers={"WWW-Authenticate": "Bearer"},
             )
         if not email_from_keycloak_payload(payload):
diff --git a/api/src/core/security.py b/api/src/core/security.py
index 309a402..c8871b1 100644
--- a/api/src/core/security.py
+++ b/api/src/core/security.py
@@ -1,5 +1,4 @@
 from datetime import datetime, timedelta, timezone
-import logging
 from typing import Optional
 
 import httpx
@@ -10,7 +9,6 @@ from jose import JOSEError, JWTError, jwt
 from src.core.config import settings
 
 pwd_context = PasswordHasher()
-logger = logging.getLogger(__name__)
 
 _KEYCLOAK_ALGORITHMS = ["RS256"]
 _KEYCLOAK_DECODE_OPTIONS = {
@@ -112,33 +110,13 @@ def _decode_with_jwks(token: str, jwks: dict) -> dict:
 
 def decode_keycloak_token(token: str) -> Optional[dict]:
     """Проверяет Keycloak JWT по JWKS и возвращает payload."""
-    payload, _reason = inspect_keycloak_token(token)
-    return payload
-
-
-def inspect_keycloak_token(token: str) -> tuple[Optional[dict], str | None]:
-    """Как decode_keycloak_token, плюс текст причины отказа (для отладки логина)."""
     raw = normalize_bearer_token(token)
     if raw is None:
-        return None, "empty token"
-    alg = None
-    kid = None
+        return None
     try:
-        header = jwt.get_unverified_header(raw)
-        alg = header.get("alg")
-        kid = header.get("kid")
-    except Exception as exc:
-        return None, f"malformed jwt: {exc}"
-    try:
-        return _decode_with_jwks(raw, _get_jwks()), None
-    except (JOSEError, httpx.HTTPError, ValueError, TypeError, KeyError) as exc:
-        logger.warning("Keycloak JWT rejected: %s", exc)
+        return _decode_with_jwks(raw, _get_jwks())
+    except (JOSEError, httpx.HTTPError, ValueError, TypeError, KeyError):
         try:
-            return _decode_with_jwks(raw, _get_jwks(force_refresh=True)), None
-        except (JOSEError, httpx.HTTPError, ValueError, TypeError, KeyError) as retry_exc:
-            logger.warning("Keycloak JWT rejected after JWKS refresh: %s", retry_exc)
-            reason = (
-                f"{retry_exc.__class__.__name__}: {retry_exc}; "
-                f"alg={alg}; kid={kid}; jwks_url={settings.JWKS_URL}"
-            )
-            return None, reason
+            return _decode_with_jwks(raw, _get_jwks(force_refresh=True))
+        except (JOSEError, httpx.HTTPError, ValueError, TypeError, KeyError):
+            return None
diff --git a/api/tests/unit/test_auth_api_prod_branch.py b/api/tests/unit/test_auth_api_prod_branch.py
index c734034..c087ef5 100644
--- a/api/tests/unit/test_auth_api_prod_branch.py
+++ b/api/tests/unit/test_auth_api_prod_branch.py
@@ -72,8 +72,8 @@ def test_auth_login_non_debug_branch_success_and_unauthorized(monkeypatch):
             )
             m.setattr(
                 auth_module,
-                "inspect_keycloak_token",
-                lambda _token: ({"email": "prod-user@example.com"}, None),
+                "decode_keycloak_token",
+                lambda _token: {"email": "prod-user@example.com"},
             )
             client = TestClient(app)
 
@@ -144,8 +144,8 @@ def test_auth_login_non_debug_rejects_missing_email(monkeypatch):
         with monkeypatch.context() as m:
             m.setattr(
                 auth_module,
-                "inspect_keycloak_token",
-                lambda _token: ({"sub": "x"}, None),
+                "decode_keycloak_token",
+                lambda _token: {"sub": "x"},
             )
             client = TestClient(app)
             response = client.post("/auth/login", json={"token": "kc-token"})
@@ -172,16 +172,13 @@ def test_auth_login_non_debug_rejects_invalid_token(monkeypatch):
         with monkeypatch.context() as m:
             m.setattr(
                 auth_module,
-                "inspect_keycloak_token",
-                lambda _token: (None, "Signature verification failed; alg=RS256"),
+                "decode_keycloak_token",
+                lambda _token: None,
             )
             client = TestClient(app)
             response = client.post("/auth/login", json={"token": "bad"})
             assert response.status_code == 401
-            message = response.json()["message"]
-            assert message.startswith("Недействительный токен Keycloak")
-            assert "Signature verification failed" in message
-            assert "alg=RS256" in message
+            assert response.json()["message"] == "Недействительный токен Keycloak"
     finally:
         _restore_module(monkeypatch, "src.api.v1.auth", original_debug, previous)
 
diff --git a/api/tests/unit/test_auth_service.py b/api/tests/unit/test_auth_service.py
index 5221964..0c0a478 100644
--- a/api/tests/unit/test_auth_service.py
+++ b/api/tests/unit/test_auth_service.py
@@ -10,7 +10,6 @@ from src.core.security import (
     clear_jwks_cache,
     create_refresh_token,
     decode_keycloak_token,
-    inspect_keycloak_token,
     verify_token,
 )
 from src.services.auth_service import AuthService
@@ -25,9 +24,6 @@ def test_decode_keycloak_token_rejects_garbage(monkeypatch):
     clear_jwks_cache()
     monkeypatch.setattr("src.core.security._get_jwks", lambda **_kwargs: {"keys": []})
     assert decode_keycloak_token("not-a-jwt") is None
-    _payload, reason = inspect_keycloak_token("not-a-jwt")
-    assert _payload is None
-    assert reason
 
 
 def test_decode_keycloak_token_accepts_valid_rs256(monkeypatch):