diff --git a/libs/core/langchain_core/load/serializable.py b/libs/core/langchain_core/load/serializable.py
index a9a031823ea..9da23152f61 100644
--- a/libs/core/langchain_core/load/serializable.py
+++ b/libs/core/langchain_core/load/serializable.py
@@ -1,6 +1,7 @@
 """Serializable base class."""
 
 import contextlib
+import logging
 from abc import ABC
 from typing import (
     Any,
@@ -15,6 +16,8 @@ from pydantic import BaseModel, ConfigDict
 from pydantic.fields import FieldInfo
 from typing_extensions import NotRequired, override
 
+logger = logging.getLogger(__name__)
+
 
 class BaseSerialized(TypedDict):
     """Base class for serialized objects.
@@ -359,7 +362,7 @@ def to_json_not_implemented(obj: object) -> SerializedNotImplemented:
         elif hasattr(obj, "__class__"):
             _id = [*obj.__class__.__module__.split("."), obj.__class__.__name__]
     except Exception:
-        pass
+        logger.debug("Failed to serialize object", exc_info=True)
 
     result: SerializedNotImplemented = {
         "lc": 1,
diff --git a/libs/core/langchain_core/messages/ai.py b/libs/core/langchain_core/messages/ai.py
index 46c838ab48f..46e14bf7578 100644
--- a/libs/core/langchain_core/messages/ai.py
+++ b/libs/core/langchain_core/messages/ai.py
@@ -1,6 +1,7 @@
 """AI message."""
 
 import json
+import logging
 import operator
 from typing import Any, Literal, Optional, Union, cast
 
@@ -32,6 +33,8 @@ from langchain_core.utils._merge import merge_dicts, merge_lists
 from langchain_core.utils.json import parse_partial_json
 from langchain_core.utils.usage import _dict_int_op
 
+logger = logging.getLogger(__name__)
+
 
 class InputTokenDetails(TypedDict, total=False):
     """Breakdown of input token counts.
@@ -210,7 +213,7 @@ class AIMessage(BaseMessage):
                     values["tool_calls"] = parsed_tool_calls
                     values["invalid_tool_calls"] = parsed_invalid_tool_calls
             except Exception:
-                pass
+                logger.debug("Failed to parse tool calls", exc_info=True)
 
         # Ensure "type" is properly set on all tool call-like dicts.
         if tool_calls := values.get("tool_calls"):
diff --git a/libs/core/langchain_core/sys_info.py b/libs/core/langchain_core/sys_info.py
index 6520e0b99d2..38d53e159b4 100644
--- a/libs/core/langchain_core/sys_info.py
+++ b/libs/core/langchain_core/sys_info.py
@@ -20,11 +20,7 @@ def _get_sub_deps(packages: Sequence[str]) -> list[str]:
             continue
 
         for req in required:
-            try:
-                cleaned_req = req.split(" ")[0]
-            except Exception:  # In case parsing of requirement spec fails
-                continue
-
+            cleaned_req = req.split(" ")[0]
             if cleaned_req.replace("-", "_") not in _underscored_packages:
                 sub_deps.add(cleaned_req)
 
diff --git a/libs/core/pyproject.toml b/libs/core/pyproject.toml
index 93f3494d998..28557c31c38 100644
--- a/libs/core/pyproject.toml
+++ b/libs/core/pyproject.toml
@@ -107,8 +107,6 @@ ignore = [
     "PYI",
     "RET",
     "RUF",
-    "S110",
-    "S112",
     "SLF",
     "TD",
 ]