diff --git a/.changeset/slimy-owls-matter.md b/.changeset/slimy-owls-matter.md
new file mode 100644
index 00000000..201949c6
--- /dev/null
+++ b/.changeset/slimy-owls-matter.md
@@ -0,0 +1,5 @@
+---
+"chainlink-deployments-framework": patch
+---
+
+fix(mcms): render proposal parameters in collapsible code blocks
diff --git a/engine/cld/mcms/proposalanalysis/engine_test.go b/engine/cld/mcms/proposalanalysis/engine_test.go
index 491f5222..9d652a93 100644
--- a/engine/cld/mcms/proposalanalysis/engine_test.go
+++ b/engine/cld/mcms/proposalanalysis/engine_test.go
@@ -277,32 +277,40 @@ func TestAnalyzerEngineE2E_RunAndRenderMarkdown(t *testing.T) {
 	}, analyzed)
 	require.NoError(t, err)
 
-	expected := `## Proposal — mcms (staging)
-
-
-
-_Annotations:_
-- proposal.note: generated by analyzer
-
-<details>
-<summary><h3>Batch 1 — ethereum-testnet-sepolia (<code>16015286601757825753</code>)</h3></summary>
-
-
-#### Call 1
-
-- [ ] ` + "`native_transfer`" + `
-
-**Target:** ` + "`0x1234567890123456789012345678901234567890`" + `
-
-**Inputs:**
-
-- **` + "`recipient`" + `** (` + "`AddressField`" + `): 0x1234567890123456789012345678901234567890
-- **` + "`amount_wei`" + `** (` + "`SimpleField`" + `): 1000000000000000000
-- **` + "`amount_eth`" + `** (` + "`SimpleField`" + `): 1.000000000000000000
-
-
-</details>
-`
+	expected := "## Proposal — mcms (staging)\n\n\n\n" +
+		"_Annotations:_\n" +
+		"- proposal.note: generated by analyzer\n\n" +
+		"<details>\n" +
+		"<summary><h3>Batch 1 — ethereum-testnet-sepolia (<code>16015286601757825753</code>)</h3></summary>\n\n\n" +
+		"#### Call 1\n\n" +
+		"- [ ] `native_transfer`\n\n" +
+		"**Target:** `0x1234567890123456789012345678901234567890`\n\n" +
+		"**Inputs:**\n\n" +
+		"- **`recipient`** (`AddressField`):\n" +
+		"  <details open>\n" +
+		"  <summary>Value</summary>\n" +
+		"\n" +
+		"  ```text\n" +
+		"  0x1234567890123456789012345678901234567890\n" +
+		"  ```\n" +
+		"  </details>\n" +
+		"- **`amount_wei`** (`SimpleField`):\n" +
+		"  <details open>\n" +
+		"  <summary>Value</summary>\n" +
+		"\n" +
+		"  ```text\n" +
+		"  1000000000000000000\n" +
+		"  ```\n" +
+		"  </details>\n" +
+		"- **`amount_eth`** (`SimpleField`):\n" +
+		"  <details open>\n" +
+		"  <summary>Value</summary>\n" +
+		"\n" +
+		"  ```text\n" +
+		"  1.000000000000000000\n" +
+		"  ```\n" +
+		"  </details>\n\n\n" +
+		"</details>\n"
 	require.Equal(t, expected, out.String())
 }
 
diff --git a/engine/cld/mcms/proposalanalysis/examples/ccip/analyzers/tokenpool/testdata/golden_markdown.md b/engine/cld/mcms/proposalanalysis/examples/ccip/analyzers/tokenpool/testdata/golden_markdown.md
index 9f9f8afd..545bf3f9 100644
--- a/engine/cld/mcms/proposalanalysis/examples/ccip/analyzers/tokenpool/testdata/golden_markdown.md
+++ b/engine/cld/mcms/proposalanalysis/examples/ccip/analyzers/tokenpool/testdata/golden_markdown.md
@@ -13,8 +13,22 @@
 
 **Inputs:**
 
-- **`remoteChainSelectorsToRemove`** (`uint64[]`): <nil>
-- **`chainsToAdd`** (`tuple[]`): (decoded)
+- **`remoteChainSelectorsToRemove`** (`uint64[]`):
+  <details open>
+  <summary>Value</summary>
+
+  ```text
+  <nil>
+  ```
+  </details>
+- **`chainsToAdd`** (`tuple[]`):
+  <details open>
+  <summary>Value</summary>
+
+  ```text
+  (decoded)
+  ```
+  </details>
 
 
 **Changes:**
@@ -41,8 +55,22 @@ _Annotations:_
 
 **Inputs:**
 
-- **`remoteChainSelectorsToRemove`** (`uint64[]`): [ 3734025351759498498 ]
-- **`chainsToAdd`** (`tuple[]`): <nil>
+- **`remoteChainSelectorsToRemove`** (`uint64[]`):
+  <details open>
+  <summary>Value</summary>
+
+  ```text
+  [ 3734025351759498498 ]
+  ```
+  </details>
+- **`chainsToAdd`** (`tuple[]`):
+  <details open>
+  <summary>Value</summary>
+
+  ```text
+  <nil>
+  ```
+  </details>
 
 
 _Annotations:_
diff --git a/engine/cld/mcms/proposalanalysis/renderer/funcmap.go b/engine/cld/mcms/proposalanalysis/renderer/funcmap.go
index 723539be..b84496c7 100644
--- a/engine/cld/mcms/proposalanalysis/renderer/funcmap.go
+++ b/engine/cld/mcms/proposalanalysis/renderer/funcmap.go
@@ -34,7 +34,6 @@ func defaultFuncMap() template.FuncMap {
 		"diffAnnotations":       diffAnnotations,
 		"renderDiff":            renderDiff,
 		"formatParam":           formatParam,
-		"hasNewline":            hasNewline,
 		"indentLines":           indentLines,
 		"formatAnnotationValue": formatAnnotationValue,
 		"resolveChainSelector":  resolveChainSelector,
@@ -87,10 +86,6 @@ func formatParam(param analyzer.AnalyzedParameter) string {
 	return v
 }
 
-func hasNewline(s string) bool {
-	return strings.Contains(s, "\n")
-}
-
 func indentLines(s, prefix string) string {
 	if s == "" {
 		return ""
diff --git a/engine/cld/mcms/proposalanalysis/renderer/templates/markdown/parameter.tmpl b/engine/cld/mcms/proposalanalysis/renderer/templates/markdown/parameter.tmpl
index 67ef817e..b5466cc3 100644
--- a/engine/cld/mcms/proposalanalysis/renderer/templates/markdown/parameter.tmpl
+++ b/engine/cld/mcms/proposalanalysis/renderer/templates/markdown/parameter.tmpl
@@ -1,13 +1,13 @@
 {{- define "parameter" -}}
 {{- $formatted := formatParam . -}}
-{{- if hasNewline $formatted -}}
 - **`{{ .Name }}`** (`{{ .Type }}`):
+  <details open>
+  <summary>Value</summary>
+
   ```text
 {{ indentLines $formatted "  " }}
   ```
-{{- else -}}
-- **`{{ .Name }}`** (`{{ .Type }}`): {{ $formatted }}
-{{- end -}}
+  </details>
 {{- if hasDisplayAnnotations .Annotations -}}
 {{- range .Annotations -}}
 {{- if not (isFrameworkAnnotation .Name) }}
diff --git a/engine/cld/mcms/proposalanalysis/renderer/testdata/golden_markdown.md b/engine/cld/mcms/proposalanalysis/renderer/testdata/golden_markdown.md
index 28e6e694..52937d53 100644
--- a/engine/cld/mcms/proposalanalysis/renderer/testdata/golden_markdown.md
+++ b/engine/cld/mcms/proposalanalysis/renderer/testdata/golden_markdown.md
@@ -17,12 +17,43 @@ _Annotations:_
 
 **Inputs:**
 
-- **`target`** (`address`): 0xAbCdEf1234567890abcdef1234567890abcdef12
+- **`target`** (`address`):
+  <details open>
+  <summary>Value</summary>
+
+  ```text
+  0xAbCdEf1234567890abcdef1234567890abcdef12
+  ```
+  </details>
   - _label: destination contract_
-- **`amount`** (`uint256`): 1,000,000,000,000,000,000
-- **`enabled`** (`bool`): true
-- **`proof`** (`bytes`): 0xdeadbeef
+- **`amount`** (`uint256`):
+  <details open>
+  <summary>Value</summary>
+
+  ```text
+  1,000,000,000,000,000,000
+  ```
+  </details>
+- **`enabled`** (`bool`):
+  <details open>
+  <summary>Value</summary>
+
+  ```text
+  true
+  ```
+  </details>
+- **`proof`** (`bytes`):
+  <details open>
+  <summary>Value</summary>
+
+  ```text
+  0xdeadbeef
+  ```
+  </details>
 - **`destChainConfigArgs`** (`((uint64,(bool,uint16,uint32,uint32,uint32,uint8,uint8,uint16,uint32,uint16,uint16,bytes4,bool,uint16,uint32,uint32,uint64,uint32,uint32))[])`):
+  <details open>
+  <summary>Value</summary>
+
   ```text
   [
     {
@@ -51,6 +82,7 @@ _Annotations:_
     }
   ]
   ```
+  </details>
   - _note: multi-chain destination configuration_
 
 
@@ -71,8 +103,22 @@ _Annotations:_
 
 **Inputs:**
 
-- **`to`** (`address`): 0xdeadbeefdeadbeefdeadbeefdeadbeefdeadbeef
-- **`value`** (`uint256`): 500
+- **`to`** (`address`):
+  <details open>
+  <summary>Value</summary>
+
+  ```text
+  0xdeadbeefdeadbeefdeadbeefdeadbeefdeadbeef
+  ```
+  </details>
+- **`value`** (`uint256`):
+  <details open>
+  <summary>Value</summary>
+
+  ```text
+  500
+  ```
+  </details>
 
 
 </details>