diff --git a/docs/prompt-compatibility.md b/docs/prompt-compatibility.md
index 26e1ba8..a84dd0f 100644
--- a/docs/prompt-compatibility.md
+++ b/docs/prompt-compatibility.md
@@ -147,6 +147,10 @@ DS2API 当前的核心思路，不是把客户端传来的 `messages`、`tools`
 3. 再附上统一的 XML tool call 格式约束。
 4. 把这整段内容并入 system prompt。
 
+工具调用正例仍只示范 canonical XML：`<tool_calls>` → `<invoke name="...">` → `<parameter name="...">`。
+正例中的工具名只会来自当前请求实际声明的工具；如果当前请求没有足够的已知工具形态，就省略对应的单工具、多工具或嵌套示例，避免把不可用工具名写进 prompt。
+对执行类工具，脚本内容必须进入执行参数本身：`Bash` / `execute_command` 使用 `command`，`exec_command` 使用 `cmd`；不要把脚本示范成 `path` / `content` 文件写入参数。
+
 OpenAI 路径实现：
 [internal/promptcompat/tool_prompt.go](../internal/promptcompat/tool_prompt.go)
 
diff --git a/internal/toolcall/tool_prompt.go b/internal/toolcall/tool_prompt.go
index 6b1ce0e..7f405d2 100644
--- a/internal/toolcall/tool_prompt.go
+++ b/internal/toolcall/tool_prompt.go
@@ -9,31 +9,6 @@ import "strings"
 // The toolNames slice should contain the actual tool names available in the
 // current request; the function picks real names for examples.
 func BuildToolCallInstructions(toolNames []string) string {
-	// Pick real tool names for examples; fall back to generic names.
-	ex1 := "read_file"
-	ex2 := "write_to_file"
-	ex3 := "ask_followup_question"
-	used := map[string]bool{}
-	for _, n := range toolNames {
-		switch {
-		// Read/query-type tools
-		case !used["ex1"] && matchAny(n, "read_file", "list_files", "search_files", "Read", "Glob"):
-			ex1 = n
-			used["ex1"] = true
-		// Write/execute-type tools
-		case !used["ex2"] && matchAny(n, "write_to_file", "apply_diff", "execute_command", "exec_command", "Write", "Edit", "MultiEdit", "Bash"):
-			ex2 = n
-			used["ex2"] = true
-		// Interactive/meta tools
-		case !used["ex3"] && matchAny(n, "ask_followup_question", "attempt_completion", "update_todo_list", "Task"):
-			ex3 = n
-			used["ex3"] = true
-		}
-	}
-	ex1Params := exampleReadParams(ex1)
-	ex2Params := exampleWriteOrExecParams(ex2)
-	ex3Params := exampleInteractiveParams(ex3)
-
 	return `TOOL CALL FORMAT — FOLLOW EXACTLY:
 
 <tool_calls>
@@ -70,49 +45,106 @@ Wrong 2 — Markdown code fences:
 
 Remember: The ONLY valid way to use tools is the <tool_calls>...</tool_calls> XML block at the end of your response.
 
-【CORRECT EXAMPLES】:
+` + buildCorrectToolExamples(toolNames)
+}
 
-Example A — Single tool:
-<tool_calls>
-  <invoke name="` + ex1 + `">
-` + indentPromptParameters(ex1Params, "    ") + `
-  </invoke>
-</tool_calls>
+type promptToolExample struct {
+	name   string
+	params string
+}
 
-Example B — Two tools in parallel:
-<tool_calls>
-  <invoke name="` + ex1 + `">
-` + indentPromptParameters(ex1Params, "    ") + `
-  </invoke>
-  <invoke name="` + ex2 + `">
-` + indentPromptParameters(ex2Params, "    ") + `
-  </invoke>
-  <invoke name="Read">
-    <parameter name="file_path">` + promptCDATA("/abs/path/to/another-file.txt") + `</parameter>
-  </invoke>
-</tool_calls>
+func buildCorrectToolExamples(toolNames []string) string {
+	names := uniqueToolNames(toolNames)
+	examples := make([]string, 0, 4)
 
-Example C — Tool with nested XML parameters:
-<tool_calls>
-  <invoke name="` + ex3 + `">
-` + indentPromptParameters(ex3Params, "    ") + `
-  </invoke>
-</tool_calls>
+	if single, ok := firstBasicExample(names); ok {
+		examples = append(examples, "Example A — Single tool:\n"+renderToolExampleBlock([]promptToolExample{single}))
+	}
 
-Example D — Tool with long script using CDATA (RELIABLE FOR CODE/SCRIPTS):
-<tool_calls>
-  <invoke name="` + ex2 + `">
-    <parameter name="path">` + promptCDATA("script.sh") + `</parameter>
-    <parameter name="content"><![CDATA[
-#!/bin/bash
-if [ "$1" == "test" ]; then
-  echo "Success!"
-fi
-]]></parameter>
-  </invoke>
-</tool_calls>
+	if parallel := firstNBasicExamples(names, 2); len(parallel) >= 2 {
+		examples = append(examples, "Example B — Two tools in parallel:\n"+renderToolExampleBlock(parallel))
+	}
 
-`
+	if nested, ok := firstNestedExample(names); ok {
+		examples = append(examples, "Example C — Tool with nested XML parameters:\n"+renderToolExampleBlock([]promptToolExample{nested}))
+	}
+
+	if script, ok := firstScriptExample(names); ok {
+		examples = append(examples, "Example D — Tool with long script using CDATA (RELIABLE FOR CODE/SCRIPTS):\n"+renderToolExampleBlock([]promptToolExample{script}))
+	}
+
+	if len(examples) == 0 {
+		return ""
+	}
+	return "【CORRECT EXAMPLES】:\n\n" + strings.Join(examples, "\n\n") + "\n\n"
+}
+
+func uniqueToolNames(toolNames []string) []string {
+	names := make([]string, 0, len(toolNames))
+	seen := map[string]bool{}
+	for _, name := range toolNames {
+		name = strings.TrimSpace(name)
+		if name == "" || seen[name] {
+			continue
+		}
+		seen[name] = true
+		names = append(names, name)
+	}
+	return names
+}
+
+func firstBasicExample(names []string) (promptToolExample, bool) {
+	for _, name := range names {
+		if params, ok := exampleBasicParams(name); ok {
+			return promptToolExample{name: name, params: params}, true
+		}
+	}
+	return promptToolExample{}, false
+}
+
+func firstNBasicExamples(names []string, count int) []promptToolExample {
+	out := make([]promptToolExample, 0, count)
+	for _, name := range names {
+		if params, ok := exampleBasicParams(name); ok {
+			out = append(out, promptToolExample{name: name, params: params})
+			if len(out) == count {
+				return out
+			}
+		}
+	}
+	return out
+}
+
+func firstNestedExample(names []string) (promptToolExample, bool) {
+	for _, name := range names {
+		if params, ok := exampleNestedParams(name); ok {
+			return promptToolExample{name: name, params: params}, true
+		}
+	}
+	return promptToolExample{}, false
+}
+
+func firstScriptExample(names []string) (promptToolExample, bool) {
+	for _, name := range names {
+		if params, ok := exampleScriptParams(name); ok {
+			return promptToolExample{name: name, params: params}, true
+		}
+	}
+	return promptToolExample{}, false
+}
+
+func renderToolExampleBlock(calls []promptToolExample) string {
+	var b strings.Builder
+	b.WriteString("<tool_calls>\n")
+	for _, call := range calls {
+		b.WriteString(`  <invoke name="`)
+		b.WriteString(call.name)
+		b.WriteString("\">\n")
+		b.WriteString(indentPromptParameters(call.params, "    "))
+		b.WriteString("\n  </invoke>\n")
+	}
+	b.WriteString("</tool_calls>")
+	return b.String()
 }
 
 func indentPromptParameters(body, indent string) string {
@@ -134,48 +166,70 @@ func wrapParameter(name, inner string) string {
 	return `<parameter name="` + name + `">` + inner + `</parameter>`
 }
 
-func exampleReadParams(name string) string {
+func exampleBasicParams(name string) (string, bool) {
 	switch strings.TrimSpace(name) {
 	case "Read":
-		return wrapParameter("file_path", promptCDATA("README.md"))
+		return wrapParameter("file_path", promptCDATA("README.md")), true
 	case "Glob":
-		return wrapParameter("pattern", promptCDATA("**/*.go")) + "\n" + wrapParameter("path", promptCDATA("."))
-	default:
-		return wrapParameter("path", promptCDATA("src/main.go"))
-	}
-}
-
-func exampleWriteOrExecParams(name string) string {
-	switch strings.TrimSpace(name) {
+		return wrapParameter("pattern", promptCDATA("**/*.go")) + "\n" + wrapParameter("path", promptCDATA(".")), true
+	case "read_file":
+		return wrapParameter("path", promptCDATA("src/main.go")), true
+	case "list_files":
+		return wrapParameter("path", promptCDATA(".")), true
+	case "search_files":
+		return wrapParameter("query", promptCDATA("tool call parser")), true
 	case "Bash", "execute_command":
-		return wrapParameter("command", promptCDATA("pwd"))
+		return wrapParameter("command", promptCDATA("pwd")), true
 	case "exec_command":
-		return wrapParameter("cmd", promptCDATA("pwd"))
+		return wrapParameter("cmd", promptCDATA("pwd")), true
+	case "Write":
+		return wrapParameter("file_path", promptCDATA("notes.txt")) + "\n" + wrapParameter("content", promptCDATA("Hello world")), true
+	case "write_to_file":
+		return wrapParameter("path", promptCDATA("notes.txt")) + "\n" + wrapParameter("content", promptCDATA("Hello world")), true
 	case "Edit":
-		return wrapParameter("file_path", promptCDATA("README.md")) + "\n" + wrapParameter("old_string", promptCDATA("foo")) + "\n" + wrapParameter("new_string", promptCDATA("bar"))
+		return wrapParameter("file_path", promptCDATA("README.md")) + "\n" + wrapParameter("old_string", promptCDATA("foo")) + "\n" + wrapParameter("new_string", promptCDATA("bar")), true
 	case "MultiEdit":
-		return wrapParameter("file_path", promptCDATA("README.md")) + "\n" + `<parameter name="edits"><item><old_string>` + promptCDATA("foo") + `</old_string><new_string>` + promptCDATA("bar") + `</new_string></item></parameter>`
-	default:
-		return wrapParameter("path", promptCDATA("output.txt")) + "\n" + wrapParameter("content", promptCDATA("Hello world"))
+		return wrapParameter("file_path", promptCDATA("README.md")) + "\n" + `<parameter name="edits"><item><old_string>` + promptCDATA("foo") + `</old_string><new_string>` + promptCDATA("bar") + `</new_string></item></parameter>`, true
 	}
+	return "", false
 }
 
-func exampleInteractiveParams(name string) string {
+func exampleNestedParams(name string) (string, bool) {
 	switch strings.TrimSpace(name) {
+	case "MultiEdit":
+		return wrapParameter("file_path", promptCDATA("README.md")) + "\n" + `<parameter name="edits"><item><old_string>` + promptCDATA("foo") + `</old_string><new_string>` + promptCDATA("bar") + `</new_string></item></parameter>`, true
 	case "Task":
-		return wrapParameter("description", promptCDATA("Investigate flaky tests")) + "\n" + wrapParameter("prompt", promptCDATA("Run targeted tests and summarize failures"))
-	default:
-		return wrapParameter("question", promptCDATA("Which approach do you prefer?")) + "\n" + `<parameter name="follow_up"><item><text>` + promptCDATA("Option A") + `</text></item><item><text>` + promptCDATA("Option B") + `</text></item></parameter>`
+		return wrapParameter("description", promptCDATA("Investigate flaky tests")) + "\n" + wrapParameter("prompt", promptCDATA("Run targeted tests and summarize failures")), true
+	case "ask_followup_question":
+		return wrapParameter("question", promptCDATA("Which approach do you prefer?")) + "\n" + `<parameter name="follow_up"><item><text>` + promptCDATA("Option A") + `</text></item><item><text>` + promptCDATA("Option B") + `</text></item></parameter>`, true
 	}
+	return "", false
 }
 
-func matchAny(name string, candidates ...string) bool {
-	for _, c := range candidates {
-		if name == c {
-			return true
-		}
+func exampleScriptParams(name string) (string, bool) {
+	scriptCommand := `cat > /tmp/test_escape.sh <<'EOF'
+#!/bin/bash
+echo 'single "double"'
+echo "literal dollar: \$HOME"
+EOF
+bash /tmp/test_escape.sh`
+	scriptContent := `#!/bin/bash
+echo 'single "double"'
+echo "literal dollar: $HOME"`
+
+	switch strings.TrimSpace(name) {
+	case "Bash":
+		return wrapParameter("command", promptCDATA(scriptCommand)) + "\n" + wrapParameter("description", promptCDATA("Test shell escaping")), true
+	case "execute_command":
+		return wrapParameter("command", promptCDATA(scriptCommand)), true
+	case "exec_command":
+		return wrapParameter("cmd", promptCDATA(scriptCommand)), true
+	case "Write":
+		return wrapParameter("file_path", promptCDATA("test_escape.sh")) + "\n" + wrapParameter("content", promptCDATA(scriptContent)), true
+	case "write_to_file":
+		return wrapParameter("path", promptCDATA("test_escape.sh")) + "\n" + wrapParameter("content", promptCDATA(scriptContent)), true
 	}
-	return false
+	return "", false
 }
 
 func promptCDATA(text string) string {
diff --git a/internal/toolcall/tool_prompt_test.go b/internal/toolcall/tool_prompt_test.go
index c063bca..8b0e8cf 100644
--- a/internal/toolcall/tool_prompt_test.go
+++ b/internal/toolcall/tool_prompt_test.go
@@ -24,3 +24,107 @@ func TestBuildToolCallInstructions_ExecuteCommandUsesCommandExample(t *testing.T
 		t.Fatalf("expected command parameter example for execute_command, got: %s", out)
 	}
 }
+
+func TestBuildToolCallInstructions_BashUsesCommandAndDescriptionExamples(t *testing.T) {
+	out := BuildToolCallInstructions([]string{"Bash"})
+	blocks := findInvokeBlocks(out, "Bash")
+	if len(blocks) == 0 {
+		t.Fatalf("expected Bash examples, got: %s", out)
+	}
+
+	sawDescription := false
+	for _, block := range blocks {
+		if !strings.Contains(block, `<parameter name="command">`) {
+			t.Fatalf("expected every Bash example to use command parameter, got: %s", block)
+		}
+		if strings.Contains(block, `<parameter name="path">`) || strings.Contains(block, `<parameter name="content">`) {
+			t.Fatalf("expected Bash examples not to use file write parameters, got: %s", block)
+		}
+		if strings.Contains(block, `<parameter name="description">`) {
+			sawDescription = true
+		}
+	}
+	if !sawDescription {
+		t.Fatalf("expected Bash long-script example to include description, got: %s", out)
+	}
+	if strings.Contains(out, `<invoke name="Read">`) {
+		t.Fatalf("expected examples to avoid unavailable hard-coded Read tool, got: %s", out)
+	}
+}
+
+func TestBuildToolCallInstructions_ExecuteCommandLongScriptUsesCommand(t *testing.T) {
+	out := BuildToolCallInstructions([]string{"execute_command"})
+	blocks := findInvokeBlocks(out, "execute_command")
+	if len(blocks) == 0 {
+		t.Fatalf("expected execute_command examples, got: %s", out)
+	}
+
+	for _, block := range blocks {
+		if !strings.Contains(block, `<parameter name="command">`) {
+			t.Fatalf("expected execute_command examples to use command parameter, got: %s", block)
+		}
+		if strings.Contains(block, `<parameter name="path">`) || strings.Contains(block, `<parameter name="content">`) {
+			t.Fatalf("expected execute_command examples not to use file write parameters, got: %s", block)
+		}
+	}
+	if !strings.Contains(out, `test_escape.sh`) {
+		t.Fatalf("expected execute_command long-script example, got: %s", out)
+	}
+}
+
+func TestBuildToolCallInstructions_ExecCommandLongScriptUsesCmd(t *testing.T) {
+	out := BuildToolCallInstructions([]string{"exec_command"})
+	blocks := findInvokeBlocks(out, "exec_command")
+	if len(blocks) == 0 {
+		t.Fatalf("expected exec_command examples, got: %s", out)
+	}
+
+	for _, block := range blocks {
+		if !strings.Contains(block, `<parameter name="cmd">`) {
+			t.Fatalf("expected exec_command examples to use cmd parameter, got: %s", block)
+		}
+		if strings.Contains(block, `<parameter name="command">`) || strings.Contains(block, `<parameter name="path">`) || strings.Contains(block, `<parameter name="content">`) {
+			t.Fatalf("expected exec_command examples not to use command or file write parameters, got: %s", block)
+		}
+	}
+	if !strings.Contains(out, `test_escape.sh`) {
+		t.Fatalf("expected exec_command long-script example, got: %s", out)
+	}
+}
+
+func TestBuildToolCallInstructions_WriteUsesFilePathAndContent(t *testing.T) {
+	out := BuildToolCallInstructions([]string{"Write"})
+	blocks := findInvokeBlocks(out, "Write")
+	if len(blocks) == 0 {
+		t.Fatalf("expected Write examples, got: %s", out)
+	}
+
+	for _, block := range blocks {
+		if !strings.Contains(block, `<parameter name="file_path">`) || !strings.Contains(block, `<parameter name="content">`) {
+			t.Fatalf("expected Write examples to use file_path and content, got: %s", block)
+		}
+		if strings.Contains(block, `<parameter name="path">`) {
+			t.Fatalf("expected Write examples not to use path, got: %s", block)
+		}
+	}
+}
+
+func findInvokeBlocks(text, name string) []string {
+	open := `<invoke name="` + name + `">`
+	remaining := text
+	blocks := []string{}
+	for {
+		start := strings.Index(remaining, open)
+		if start < 0 {
+			return blocks
+		}
+		remaining = remaining[start:]
+		end := strings.Index(remaining, `</invoke>`)
+		if end < 0 {
+			return blocks
+		}
+		end += len(`</invoke>`)
+		blocks = append(blocks, remaining[:end])
+		remaining = remaining[end:]
+	}
+}