deploy: chore(main): release 0.31.0 (#2814)

🤖 I have created a release *beep* *boop*
---

##
[0.31.0](v0.30.0...v0.31.0)
(2026-03-26)

### ⚠ BREAKING CHANGES

* release upgraded docsite
([#2831](#2831))
* **http:** sanitize non-2xx error output
([#2654](#2654))
* add a new `enable-api` flag
([#2846](#2846))
* remove deprecations and update tools-file flag
([#2806](#2806))

### Features

* Add a new `enable-api` flag
([#2846](#2846))
([7a070da](7a070da))
* **auth:** Add generic `authService` type for MCP
([#2619](#2619))
([f6678f8](f6678f8))
* **auth:** Add Protected Resource Metadata endpoint
([#2698](#2698))
([b53dcf2](b53dcf2))
* **auth:** Support manual PRM override
([#2717](#2717))
([283e4e3](283e4e3))
* **dataplex:** Add support for lookup context tool.
([#2744](#2744))
([facb69d](facb69d))
* Remove deprecations and update tools-file flag
([#2806](#2806))
([ab64c95](ab64c95))

### Bug Fixes

* **ci:** Remove search index generation from preview deployment
workflow
([#2859](#2859))
([f8891b8](f8891b8))
* **docs:** Skip empty folders in pagination & reduce PR comment noise
([#2853](#2853))
([9ebd93a](9ebd93a))
* **http:** Sanitize non-2xx error output
([#2654](#2654))
([5bef954](5bef954))
* **skills:** Fix integer parameter parsing through agent skills
([#2847](#2847))
([4564efe](4564efe))

### Documentation

* Release upgraded docsite
([#2831](#2831))
([5b25ce0](5b25ce0))

---
This PR was generated with [Release
Please](https://github.com/googleapis/release-please). See
[documentation](https://github.com/googleapis/release-please#release-please).

---------

Co-authored-by: release-please[bot] <55107282+release-please[bot]@users.noreply.github.com>
Co-authored-by: Yuan Teoh <45984206+Yuan325@users.noreply.github.com> c6b811c

Author: Yuan325

dev/documentation/connect-to/ides/looker_mcp/index.html

@@ -234,7 +234,7 @@
       },
       "outputs": [],
       "source": [
-        "version = \"0.30.0\" # x-release-please-version\n",
+        "version = \"0.31.0\" # x-release-please-version\n",
         "! curl -O https://storage.googleapis.com/genai-toolbox/v{version}/linux/amd64/toolbox\n",
         "\n",
         "# Make the binary executable\n",

dev/documentation/connect-to/ides/mssql_mcp/index.html

@@ -568,7 +568,7 @@
 </span>Tip</p><p>Select the
 <a href=https://github.com/googleapis/genai-toolbox/releases>correct binary</a>
 corresponding to your OS and CPU architecture.</p></div><div class=highlight><pre tabindex=0 class=chroma><code class=language-bash data-lang=bash><span class=line><span class=cl><span class=nb>export</span> <span class=nv>OS</span><span class=o>=</span><span class=s2>&#34;linux/amd64&#34;</span> <span class=c1># one of linux/amd64, darwin/arm64, darwin/amd64, or windows/amd64</span>
-</span></span><span class=line><span class=cl>curl -O https://storage.googleapis.com/genai-toolbox/v0.30.0/<span class=nv>$OS</span>/toolbox
+</span></span><span class=line><span class=cl>curl -O https://storage.googleapis.com/genai-toolbox/v0.31.0/<span class=nv>$OS</span>/toolbox
 </span></span></code></pre></div></li><li><p>Make the binary executable:</p><div class=highlight><pre tabindex=0 class=chroma><code class=language-bash data-lang=bash><span class=line><span class=cl>chmod +x toolbox
 </span></span></code></pre></div></li><li><p>Write the following into a <code>tools.yaml</code> file. Be sure to update any fields
 such as <code>user</code>, <code>password</code>, or <code>database</code> that you may have customized in the

dev/documentation/connect-to/ides/mysql_mcp/index.html

@@ -566,7 +566,7 @@
 </span>Tip</p><p>Select the
 <a href=https://github.com/googleapis/genai-toolbox/releases>correct binary</a>
 corresponding to your OS and CPU architecture.</p></div><div class=highlight><pre tabindex=0 class=chroma><code class=language-bash data-lang=bash><span class=line><span class=cl><span class=nb>export</span> <span class=nv>OS</span><span class=o>=</span><span class=s2>&#34;linux/amd64&#34;</span> <span class=c1># one of linux/amd64, darwin/arm64, darwin/amd64, or windows/amd64</span>
-</span></span><span class=line><span class=cl>curl -O https://storage.googleapis.com/genai-toolbox/v0.30.0/<span class=nv>$OS</span>/toolbox
+</span></span><span class=line><span class=cl>curl -O https://storage.googleapis.com/genai-toolbox/v0.31.0/<span class=nv>$OS</span>/toolbox
 </span></span></code></pre></div></li><li><p>Make the binary executable:</p><div class=highlight><pre tabindex=0 class=chroma><code class=language-bash data-lang=bash><span class=line><span class=cl>chmod +x toolbox
 </span></span></code></pre></div></li><li><p>Write the following into a <code>tools.yaml</code> file. Be sure to update any fields
 such as <code>user</code>, <code>password</code>, or <code>database</code> that you may have customized in the