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docs/how-to-guides/develop-a-tool/create-custom-llm-tool.md

@@ -4,60 +4,59 @@ In this document, we will guide you through the process of developing a tool wit
 Custom LLM is a large language model fine-tuned by yourself. If you find it has good performance and is useful, then you can follow this guidance to make it a tool so that it can be shared with other people to have more impact.
 
 ## Prerequisites
-- Please ensure that your `Prompt flow` for VS Code is updated to version 1.2.0 or later.
+- Please ensure that your [Prompt flow for VS Code](https://marketplace.visualstudio.com/items?itemName=prompt-flow.prompt-flow) is updated to version 1.2.0 or later.
 
 ## How to create a custom LLM tool
 Here we use [an existing tool package](../../../examples/tools/tool-package-quickstart/my_tool_package) as an example. If you want to create your own tool, please refer to [create and use tool package](create-and-use-tool-package.md).  
 
-### Add a `PromptTemplate` input to your tool, like in [this example](../../../examples/tools/tool-package-quickstart/my_tool_package/tools/tool_with_custom_llm_type.py)
-
-```python
-from jinja2 import Template
-from promptflow import tool
-from promptflow.connections import CustomConnection
-# 1. Import the PromptTemplate type.
-from promptflow.contracts.types import PromptTemplate
-
-
-# 2. Add a PromptTemplate input for your tool method.
-@tool
-def my_tool(connection: CustomConnection, prompt: PromptTemplate, **kwargs) -> str:
-    # 3. The prompt is used for your custom LLM to do inference, customize your own code to handle and use the prompt here.
-    message = Template(prompt, trim_blocks=True, keep_trailing_newline=True).render(**kwargs)
-    return message
-```
-
-### Generate custom LLM tool YAML
-
-Run the command below in your tool project directory to automatically generate your tool YAML, use _-t "custom_llm"_ or _--tool-type "custom_llm"_ to indicate this is a custom LLM tool:
-```
-python <path-to-scripts>\tool\generate_package_tool_meta.py -m <tool_module> -o <tool_yaml_path> -t "custom_llm"
-```
-Here we use [an existing tool](../../../examples/tools/tool-package-quickstart/my_tool_package/yamls/tool_with_custom_llm_type.yaml) as an example.
-```
-cd D:\proj\github\promptflow\examples\tools\tool-package-quickstart
-
-python D:\proj\github\promptflow\scripts\tool\generate_package_tool_meta.py -m my_tool_package.tools.tool_with_custom_llm_type -o my_tool_package\yamls\tool_with_custom_llm_type.yaml -n "My Custom LLM Tool" -d "This is a tool to demonstrate the custom_llm tool type" -t "custom_llm"
-```
-This command will generate a YAML file as follows:
-
-```yaml
-my_tool_package.tools.tool_with_custom_llm_type.my_tool:
-name: My Custom LLM Tool
-description: This is a tool to demonstrate the custom_llm tool type 
-# The type is custom_llm.
-type: custom_llm
-module: my_tool_package.tools.tool_with_custom_llm_type
-function: my_tool
-inputs:
-    connection:
-    type:
-        - CustomConnection
-```
+1. Develop tool code like in [this example](../../../examples/tools/tool-package-quickstart/my_tool_package/tools/tool_with_custom_llm_type.py).
+- Add a `CustomConnection` input to the tool, it is used for authenticating and establishing a connection to the customized large language model.
+- Add a `PromptTemplate` input to the tool, it is used to pass into the customized large language model as an argument.
+
+    ```python
+    from jinja2 import Template
+    from promptflow import tool
+    from promptflow.connections import CustomConnection
+    from promptflow.contracts.types import PromptTemplate
+
+
+    @tool
+    def my_tool(connection: CustomConnection, prompt: PromptTemplate, **kwargs) -> str:
+        # Customize your own code to use the connection and prompt here.
+        rendered_prompt = Template(prompt, trim_blocks=True, keep_trailing_newline=True).render(**kwargs)
+        return rendered_prompt
+    ```
+
+2. Generate the custom LLM tool YAML.  
+    Run the command below in your tool project directory to automatically generate your tool YAML, use _-t "custom_llm"_ or _--tool-type "custom_llm"_ to indicate this is a custom LLM tool:  
+    ```
+    python <path-to-scripts>\tool\generate_package_tool_meta.py -m <tool_module> -o <tool_yaml_path> -t "custom_llm"
+    ```
+    Here we use [an existing tool](../../../examples/tools/tool-package-quickstart/my_tool_package/yamls/tool_with_custom_llm_type.yaml) as an example.
+    ```
+    cd D:\proj\github\promptflow\examples\tools\tool-package-quickstart
+
+    python D:\proj\github\promptflow\scripts\tool\generate_package_tool_meta.py -m my_tool_package.tools.tool_with_custom_llm_type -o my_tool_package\yamls\tool_with_custom_llm_type.yaml -n "My Custom LLM Tool" -d "This is a tool to demonstrate the custom_llm tool type" -t "custom_llm"
+    ```
+    This command will generate a YAML file as follows:
+
+    ```yaml
+    my_tool_package.tools.tool_with_custom_llm_type.my_tool:
+    name: My Custom LLM Tool
+    description: This is a tool to demonstrate the custom_llm tool type 
+    # The type is custom_llm.
+    type: custom_llm
+    module: my_tool_package.tools.tool_with_custom_llm_type
+    function: my_tool
+    inputs:
+        connection:
+        type:
+            - CustomConnection
+    ```
 
 ## Use custom LLM tool in VS Code extension
 Follow the steps to [build and install your tool package](create-and-use-tool-package.md#build-and-share-the-tool-package) and [use your tool from VS Code extension](create-and-use-tool-package.md#use-your-tool-from-vscode-extension).  
 
 Here we use an existing flow to demonstrate the experience, open [this flow](../../../examples/flows/standard/custom_llm_tool_showcase/flow.dag.yaml) in VS Code extension.  
-- There is a node named "custom_llm_tool" with a prompt template file. You can either use an existing file or create a new one as the prompt template file.  
-![use_custom_llm_tool](../../media/how-to-guides/develop-a-tool/use_custom_llm_tool.png)
+- There is a node named "my_custom_llm_tool" with a prompt template file. You can either use an existing file or create a new one as the prompt template file.  
+![use_my_custom_llm_tool](../../media/how-to-guides/develop-a-tool/use_my_custom_llm_tool.png)