diff --git a/libs/partners/ollama/langchain_ollama/__init__.py b/libs/partners/ollama/langchain_ollama/__init__.py
index 51860755d7b..4d9864fc6a2 100644
--- a/libs/partners/ollama/langchain_ollama/__init__.py
+++ b/libs/partners/ollama/langchain_ollama/__init__.py
@@ -1,6 +1,15 @@
 """This is the langchain_ollama package.
 
-It provides infrastructure for interacting with the Ollama service.
+Provides infrastructure for interacting with the `Ollama <https://ollama.com/>`__
+service.
+
+.. note::
+    **Newly added in 0.3.4:** ``validate_model_on_init`` param on all models.
+    This parameter allows you to validate the model exists in Ollama locally on
+    initialization. If set to ``True``, it will raise an error if the model does not
+    exist locally. This is useful for ensuring that the model is available before
+    attempting to use it, especially in environments where models may not be
+    pre-downloaded.
 """
 
 from importlib import metadata
diff --git a/libs/partners/ollama/langchain_ollama/chat_models.py b/libs/partners/ollama/langchain_ollama/chat_models.py
index 4fbe9bce062..91b2e1aa404 100644
--- a/libs/partners/ollama/langchain_ollama/chat_models.py
+++ b/libs/partners/ollama/langchain_ollama/chat_models.py
@@ -437,7 +437,10 @@ class ChatOllama(BaseChatModel):
       unless you set ``reasoning`` to ``True``."""
 
     validate_model_on_init: bool = False
-    """Whether to validate the model exists in Ollama locally on initialization."""
+    """Whether to validate the model exists in Ollama locally on initialization.
+
+    .. versionadded:: 0.3.4
+    """
 
     mirostat: Optional[int] = None
     """Enable Mirostat sampling for controlling perplexity.
diff --git a/libs/partners/ollama/langchain_ollama/embeddings.py b/libs/partners/ollama/langchain_ollama/embeddings.py
index fedf80b5ba5..c95e2f39b43 100644
--- a/libs/partners/ollama/langchain_ollama/embeddings.py
+++ b/libs/partners/ollama/langchain_ollama/embeddings.py
@@ -128,7 +128,10 @@ class OllamaEmbeddings(BaseModel, Embeddings):
     """Model name to use."""
 
     validate_model_on_init: bool = False
-    """Whether to validate the model exists in ollama locally on initialization."""
+    """Whether to validate the model exists in ollama locally on initialization.
+
+    .. versionadded:: 0.3.4
+    """
 
     base_url: Optional[str] = None
     """Base url the model is hosted under."""
diff --git a/libs/partners/ollama/langchain_ollama/llms.py b/libs/partners/ollama/langchain_ollama/llms.py
index 89d5040b2f9..f7978ed7c7b 100644
--- a/libs/partners/ollama/langchain_ollama/llms.py
+++ b/libs/partners/ollama/langchain_ollama/llms.py
@@ -53,7 +53,10 @@ class OllamaLLM(BaseLLM):
       be present directly within the main response content."""
 
     validate_model_on_init: bool = False
-    """Whether to validate the model exists in ollama locally on initialization."""
+    """Whether to validate the model exists in ollama locally on initialization.
+
+    .. versionadded:: 0.3.4
+    """
 
     mirostat: Optional[int] = None
     """Enable Mirostat sampling for controlling perplexity.
diff --git a/uv.lock b/uv.lock
index 5343f88fb79..adf48d5e66f 100644
--- a/uv.lock
+++ b/uv.lock
@@ -2403,7 +2403,7 @@ wheels = [
 
 [[package]]
 name = "langchain-core"
-version = "0.3.69"
+version = "0.3.70"
 source = { editable = "libs/core" }
 dependencies = [
     { name = "jsonpatch" },