[Doc] Improve api doc (#29324)

- Fix doc description
- Add static method decorator

libs/partners/anthropic/langchain_anthropic/chat_models.py

@@ -636,7 +636,7 @@ class ChatAnthropic(BaseChatModel):
     def _get_ls_params(
         self, stop: Optional[List[str]] = None, **kwargs: Any
     ) -> LangSmithParams:
-        """Get the parameters used to invoke the model."""
+        """Get standard params for tracing."""
         params = self._get_invocation_params(stop=stop, **kwargs)
         ls_params = LangSmithParams(
             ls_provider="anthropic",

libs/partners/mistralai/langchain_mistralai/embeddings.py

@@ -32,7 +32,8 @@ documents/chunks)"""
 class DummyTokenizer:
     """Dummy tokenizer for when tokenizer cannot be accessed (e.g., via Huggingface)"""
 
-    def encode_batch(self, texts: List[str]) -> List[List[str]]:
+    @staticmethod
+    def encode_batch(texts: List[str]) -> List[List[str]]:
         return [list(text) for text in texts]