[ML] Add tool output processor documentation

_ml-commons-plugin/agents-tools/index.md

@@ -18,3 +18,5 @@ An _agent_ orchestrates and runs ML models and tools. For a list of supported ag
 
 A _tool_ performs a set of specific tasks. Some examples of tools are the [`VectorDBTool`]({{site.url}}{{site.baseurl}}/ml-commons-plugin/agents-tools/tools/vector-db-tool/), which supports vector search, and the [`ListIndexTool`]({{site.url}}{{site.baseurl}}/ml-commons-plugin/agents-tools/tools/list-index-tool/), which executes the List Indices API. For a list of supported tools, see [Tools]({{site.url}}{{site.baseurl}}/ml-commons-plugin/agents-tools/tools/index/).
 
+You can modify and transform tool outputs using a [processor chain]({{site.url}}{{site.baseurl}}/ml-commons-plugin/processor-chain/).
+

_ml-commons-plugin/api/agent-apis/register-agent.md

@@ -60,6 +60,7 @@ Field | Data type | Required/Optional | Description
 `name`| String | Optional | The tool name. The tool name defaults to the `type` parameter value. If you need to include multiple tools of the same type in an agent, specify different names for the tools. |
 `description`| String | Optional | The tool description. Defaults to a built-in description for the specified type. | 
 `parameters` | Object | Optional | The parameters for this tool. The parameters are highly dependent on the tool type. You can find information about specific tool types in [Tools]({{site.url}}{{site.baseurl}}/ml-commons-plugin/agents-tools/tools/index/).
+`parameters.output_processors` | Array | Optional | A list of processors used to transform the tool's output. For more information, see [Processor chain]({{site.url}}{{site.baseurl}}/ml-commons-plugin/processor-chain/).
 `attributes.input_schema` | Object | Optional | The expected input format for this tool defined as a [JSON schema](https://json-schema.org/). Used to define the structure the LLM should follow when calling the tool.
 `attributes.strict` | Boolean | Optional | Whether function calling reliably adheres to the input schema or not.
 

_ml-commons-plugin/api/train-predict/predict.md

@@ -18,6 +18,18 @@ For information about user access for this API, see [Model access control consid
 POST /_plugins/_ml/_predict/<algorithm_name>/<model_id>
 ```
 
+## Request body fields
+
+The following table lists the available request fields.
+
+Field | Data type | Required/Optional | Description
+:---  | :--- | :--- | :---
+`parameters` | Object | Optional | Model-specific parameters for prediction.
+`parameters.input_processors` | Array | Optional | A list of processors used to transform the input data before sending it to the model. For more information, see [Processor chain]({{site.url}}{{site.baseurl}}/ml-commons-plugin/processor-chain/).
+`parameters.output_processors` | Array | Optional | A list of processors used to transform the model's output data. For more information, see [Processor chain]({{site.url}}{{site.baseurl}}/ml-commons-plugin/processor-chain/).
+
+For externally hosted models, the actual input fields depend on the model's connector configuration. For more information, see [Connectors]({{site.url}}{{site.baseurl}}/ml-commons-plugin/remote-models/connectors/).
+
 ## Example request
 
 ```json

_ml-commons-plugin/opensearch-assistant.md

@@ -3,7 +3,7 @@ layout: default
 title: OpenSearch Assistant Toolkit
 has_children: false
 has_toc: false
-nav_order: 28
+nav_order: 70
 ---
 
 # OpenSearch Assistant Toolkit