diff --git a/internal/util/toolcalls_parse_markup.go b/internal/util/toolcalls_parse_markup.go
index 355a464..b7b2908 100644
--- a/internal/util/toolcalls_parse_markup.go
+++ b/internal/util/toolcalls_parse_markup.go
@@ -15,7 +15,6 @@ var antmlArgumentPattern = regexp.MustCompile(`(?is)<(?:[a-z0-9_]+:)?argument\s+
 var antmlParametersPattern = regexp.MustCompile(`(?is)<(?:[a-z0-9_]+:)?parameters\s*>\s*(\{.*?\})\s*</(?:[a-z0-9_]+:)?parameters>`)
 var invokeCallPattern = regexp.MustCompile(`(?is)<invoke\s+name="([^"]+)"\s*>(.*?)</invoke>`)
 var invokeParamPattern = regexp.MustCompile(`(?is)<parameter\s+name="([^"]+)"\s*>\s*(.*?)\s*</parameter>`)
-var invokeArgumentPattern = regexp.MustCompile(`(?is)<argument(?:\s+name="([^"]+)")?\s*>\s*(.*?)\s*</argument>`)
 
 func parseXMLToolCalls(text string) []ParsedToolCall {
 	matches := xmlToolCallPattern.FindAllString(text, -1)
@@ -112,14 +111,6 @@ func parseSingleXMLToolCall(block string) (ParsedToolCall, bool) {
 			}
 		}
 	}
-	if fallback := parseMarkupSingleToolCall("", inner); fallback.Name != "" {
-		if strings.TrimSpace(name) == "" {
-			name = fallback.Name
-		}
-		if len(params) == 0 && strings.EqualFold(strings.TrimSpace(fallback.Name), strings.TrimSpace(name)) {
-			params = fallback.Input
-		}
-	}
 	if strings.TrimSpace(name) == "" {
 		return ParsedToolCall{}, false
 	}
@@ -219,23 +210,6 @@ func parseInvokeFunctionCallStyle(text string) (ParsedToolCall, bool) {
 			input[k] = v
 		}
 	}
-	for _, am := range invokeArgumentPattern.FindAllStringSubmatch(m[2], -1) {
-		if len(am) < 3 {
-			continue
-		}
-		key := strings.TrimSpace(am[1])
-		raw := strings.TrimSpace(am[2])
-		if raw == "" {
-			continue
-		}
-		if key != "" {
-			input[key] = raw
-			continue
-		}
-		for k, v := range parseToolCallInput(raw) {
-			input[k] = v
-		}
-	}
 	return ParsedToolCall{Name: name, Input: input}, true
 }
 
diff --git a/internal/util/toolcalls_test.go b/internal/util/toolcalls_test.go
index fb5c246..3ace015 100644
--- a/internal/util/toolcalls_test.go
+++ b/internal/util/toolcalls_test.go
@@ -271,6 +271,7 @@ func TestParseToolCallsSupportsMultipleAntmlFunctionCalls(t *testing.T) {
 		t.Fatalf("expected canonical names [bash read], got %#v", calls)
 	}
 }
+
 func TestParseToolCallsDoesNotAcceptMismatchedMarkupTags(t *testing.T) {
 	text := `<tool_call><name>read_file</function><arguments>{"path":"README.md"}</arguments></tool_call>`
 	calls := ParseToolCalls(text, []string{"read_file"})