diff --git a/actions/setup/js/firewall_blocked_domains.test.cjs b/actions/setup/js/firewall_blocked_domains.test.cjs
index a693ad4b3eb..494ee4305ce 100644
--- a/actions/setup/js/firewall_blocked_domains.test.cjs
+++ b/actions/setup/js/firewall_blocked_domains.test.cjs
@@ -316,7 +316,9 @@ describe("firewall_blocked_domains.cjs", () => {
       const result = generateBlockedDomainsSection(["blocked.example.com"], TEMPLATE_PATH);
 
       expect(result).toContain("> [!WARNING]");
-      expect(result).toContain("> **⚠️ Firewall blocked 1 domain**");
+      expect(result).toContain("> <details>");
+      expect(result).toContain("> <summary>Firewall blocked 1 domain</summary>");
+      expect(result).toContain("> </details>");
       expect(result).toContain("> - `blocked.example.com`");
       expect(result).toContain("> The following domain was blocked by the firewall during workflow execution:");
       expect(result).toContain('> ```yaml\n> network:\n>   allowed:\n>     - defaults\n>     - "blocked.example.com"\n> ```');
@@ -328,7 +330,9 @@ describe("firewall_blocked_domains.cjs", () => {
       const result = generateBlockedDomainsSection(domains, TEMPLATE_PATH);
 
       expect(result).toContain("> [!WARNING]");
-      expect(result).toContain("> **⚠️ Firewall blocked 3 domains**");
+      expect(result).toContain("> <details>");
+      expect(result).toContain("> <summary>Firewall blocked 3 domains</summary>");
+      expect(result).toContain("> </details>");
       expect(result).toContain("> - `alpha.example.com`");
       expect(result).toContain("> - `beta.example.com`");
       expect(result).toContain("> - `gamma.example.com`");
@@ -360,7 +364,8 @@ describe("firewall_blocked_domains.cjs", () => {
       const result = generateBlockedDomainsSection(["api.github.com"], TEMPLATE_PATH);
 
       expect(result).toContain("> [!WARNING]");
-      expect(result).toContain("> **⚠️ Firewall blocked 1 domain**");
+      expect(result).toContain("> <details>");
+      expect(result).toContain("> <summary>Firewall blocked 1 domain</summary>");
       expect(result).toContain("> - `api.github.com`");
       expect(result).toContain("`tools.github.mode: gh-proxy`");
       expect(result).toContain("> ```yaml\n> tools:\n>   github:\n>     mode: gh-proxy\n> ```");
@@ -373,7 +378,8 @@ describe("firewall_blocked_domains.cjs", () => {
       const result = generateBlockedDomainsSection(domains, TEMPLATE_PATH);
 
       expect(result).toContain("> [!WARNING]");
-      expect(result).toContain("> **⚠️ Firewall blocked 2 domains**");
+      expect(result).toContain("> <details>");
+      expect(result).toContain("> <summary>Firewall blocked 2 domains</summary>");
       expect(result).toContain("> - `api.github.com`");
       expect(result).toContain("> - `other.example.com`");
       expect(result).toContain("> ```yaml\n> tools:\n>   github:\n>     mode: gh-proxy\n> ```");
diff --git a/actions/setup/md/firewall_blocked_domains.md b/actions/setup/md/firewall_blocked_domains.md
index cd47bc3548c..636c9d5c8df 100644
--- a/actions/setup/md/firewall_blocked_domains.md
+++ b/actions/setup/md/firewall_blocked_domains.md
@@ -1,5 +1,6 @@
 > [!WARNING]
-> **⚠️ Firewall blocked {domain_count} {domain_word}**
+> <details>
+> <summary>Firewall blocked {domain_count} {domain_word}</summary>
 >
 > The following {domain_word} {verb} blocked by the firewall during workflow execution:
 >
@@ -25,3 +26,5 @@
 {yaml_network_list}> ```
 >
 > See [Network Configuration](https://github.github.com/gh-aw/reference/network/) for more information.
+>
+> </details>