docs: update transport protocol in mcp instructions (googleapis#893)

Current default transport protocol shown in docs is using `sse`.
Updating to use `Streamable HTTP`.

Fixes googleapis#876

Author: Yuan325

docs/en/getting-started/mcp_quickstart/_index.md

@@ -218,7 +218,7 @@ In this section, we will download Toolbox, configure our tools in a
 
 1. Type `y` when it asks to install the inspector package.
 
-1. It should show the following when the MCP Inspector is up and running (please take note of <YOUR_SESSION_TOKEN>):
+1. It should show the following when the MCP Inspector is up and running (please take note of `<YOUR_SESSION_TOKEN>`):
 
     ```bash
     Starting MCP inspector...
@@ -232,11 +232,11 @@ In this section, we will download Toolbox, configure our tools in a
 
 1. Open the above link in your browser.
 
-1. For `Transport Type`, select `SSE`.
+1. For `Transport Type`, select `Streamable HTTP`.
 
-1. For `URL`, type in `http://127.0.0.1:5000/mcp/sse`.
+1. For `URL`, type in `http://127.0.0.1:5000/mcp`.
 
-1. For `Authentication` -> `Proxy Session Token`, make sure <YOUR_SESSION_TOKEN> is present.
+1. For `Configuration` -> `Proxy Session Token`, make sure `<YOUR_SESSION_TOKEN>` is present.
 
 1. Click Connect.
 
@@ -246,4 +246,4 @@ In this section, we will download Toolbox, configure our tools in a
 
     ![inspector_tools](./inspector_tools.png)
 
-1. Test out your tools here!
+1. Test out your tools here!

docs/en/getting-started/mcp_quickstart/inspector.png

@@ -69,7 +69,7 @@ Toolbox enables dynamic reloading by default. To disable, use the `--disable-rel
 
 Toolbox supports the HTTP transport protocol with and without SSE.
 
-{{< tabpane text=true >}} {{% tab header="HTTP with SSE" lang="en" %}}
+{{< tabpane text=true >}} {{% tab header="HTTP with SSE (deprecated)" lang="en" %}}
 Add the following configuration to your MCP client configuration:
 
 ```bash
@@ -130,7 +130,7 @@ testing and debugging Toolbox server.
 1. Click the `Connect` button. It might take awhile to spin up Toolbox. Voila!
    You should be able to inspect your toolbox tools!
 {{% /tab %}}
-{{% tab header="HTTP with SSE" lang="en" %}}
+{{% tab header="HTTP with SSE (deprecated)" lang="en" %}}
 1. [Run Toolbox](../getting-started/introduction/_index.md#running-the-server).
 
 1. In a separate terminal, run Inspector directly through `npx`:

docs/en/how-to/connect_via_mcp.md

@@ -208,17 +208,25 @@ In this section, we will download Toolbox, configure our tools in a
 
 1. Type `y` when it asks to install the inspector package.
 
-1. It should show the following when the MCP Inspector is up and running:
+1. It should show the following when the MCP Inspector is up and running (please take note of `<YOUR_SESSION_TOKEN>`):
 
     ```bash
-    🔍 MCP Inspector is up and running at http://127.0.0.1:5173 🚀
+    Starting MCP inspector...
+    ⚙️ Proxy server listening on localhost:6277
+    🔑 Session token: <YOUR_SESSION_TOKEN>
+       Use this token to authenticate requests or set DANGEROUSLY_OMIT_AUTH=true to disable auth
+
+    🚀 MCP Inspector is up and running at:
+       http://localhost:6274/?MCP_PROXY_AUTH_TOKEN=<YOUR_SESSION_TOKEN>
     ```
 
 1. Open the above link in your browser.
 
-1. For `Transport Type`, select `SSE`.
+1. For `Transport Type`, select `Streamable HTTP`.
+
+1. For `URL`, type in `http://127.0.0.1:5000/mcp`.
 
-1. For `URL`, type in `http://127.0.0.1:5000/mcp/sse`.
+1. For `Configuration` -> `Proxy Session Token`, make sure `<YOUR_SESSION_TOKEN>` is present.
 
 1. Click Connect.
 
@@ -228,4 +236,4 @@ In this section, we will download Toolbox, configure our tools in a
 
     ![inspector_tools](./inspector_tools.png)
 
-1. Test out your tools here!
+1. Test out your tools here!