diff --git a/internal/mcp/capture.go b/internal/mcp/capture.go
index 3ceefdf0..b0e6a306 100644
--- a/internal/mcp/capture.go
+++ b/internal/mcp/capture.go
@@ -103,7 +103,7 @@ func validateCaptureInput(input *CaptureInboxInput) (due *time.Time, rec todo.Re
 	if goal.ContainsControlChars(input.Title) {
 		return nil, rec, false, fmt.Errorf("title must not contain control characters")
 	}
-	if goal.ContainsControlChars(input.Description) {
+	if containsProseControlChars(input.Description) {
 		return nil, rec, false, fmt.Errorf("description must not contain control characters")
 	}
 	if input.Energy != nil && *input.Energy != "" && !isValidEnergy(*input.Energy) {
diff --git a/internal/mcp/handler_test.go b/internal/mcp/handler_test.go
index 52cbfe57..971117d6 100644
--- a/internal/mcp/handler_test.go
+++ b/internal/mcp/handler_test.go
@@ -56,6 +56,15 @@ func TestCaptureInbox_Validation(t *testing.T) {
 	}
 }
 
+func TestCaptureInbox_MultilineDescription(t *testing.T) {
+	// Description is multi-line Markdown prose (rendered as paragraphs and
+	// bullets), so LF/CR/HT are legitimate — same treatment as content body.
+	input := CaptureInboxInput{Title: "ok", Description: "- noticed\n\n- proposal\n\n- value"}
+	if _, _, _, err := validateCaptureInput(&input); err != nil {
+		t.Fatalf("multi-line description rejected: %v", err)
+	}
+}
+
 // --- plan_day ---
 
 func TestPlanDay_Validation(t *testing.T) {