Tool Validator Node (#468)

docs/docs/concepts/index.md

@@ -51,7 +51,7 @@ We will go through a full execution of a StateGraph later, but first, lets explo
 
 ## Nodes
 
-In StateGraph, nodes are typically python functions (sync or `async`) where the **first** positional argument is the [state](#state), and (optionally), the **second** positional argument is a "config", containing optional [configurable parameters](#configuration) (such as a `thread_id`).
+In StateGraph, nodes are typically python functions (sync or `async`) where the **first** positional argument is the [state](#state-management), and (optionally), the **second** positional argument is a "config", containing optional [configurable parameters](#configuration) (such as a `thread_id`).
 
 Similar to `NetworkX`, you add these nodes to a graph using the [add_node](https://langchain-ai.github.io/langgraph/reference/graphs/#langgraph.graph.MessageGraph) method:
 

docs/docs/reference/graphs.md

@@ -1,6 +1,6 @@
 # Graph Definitions
 
-Graphs are the core abstraction of LangGraph. Each [StateGraph](#langgraph.graph.StateGraph) implementation is used to create graph workflows. Once compiled, you can run the [CompiledGraph](#compiledgraph) to run the application.
+Graphs are the core abstraction of LangGraph. Each [StateGraph](#stategraph) implementation is used to create graph workflows. Once compiled, you can run the [CompiledGraph](#compiledgraph) to run the application.
 
 ## StateGraph
 

docs/docs/reference/prebuilt.md

@@ -1,5 +1,13 @@
 # Prebuilt
 
+## create_react_agent
+
+```python
+from langgraph.prebuilt import create_react_agent
+```
+
+::: langgraph.prebuilt.create_react_agent
+
 ## ToolNode
 
 ```python
@@ -31,13 +39,6 @@ from langgraph.prebuilt import ToolInvocation
     heading_level: 4
 
 
-## create_react_agent
-
-```python
-from langgraph.prebuilt import create_react_agent
-```
-
-::: langgraph.prebuilt.create_react_agent
 
 ## `tools_condition`
 
@@ -45,4 +46,13 @@ from langgraph.prebuilt import create_react_agent
 from langgraph.prebuilt import tools_condition
 ```
 
-::: langgraph.prebuilt.tools_condition
+::: langgraph.prebuilt.tools_condition
+
+
+## ValidationNode
+
+```python
+from langgraph.prebuilt import ValidationNode
+```
+
+::: langgraph.prebuilt.ValidationNode