diff --git a/internal/multiagent/eino_single_runner.go b/internal/multiagent/eino_single_runner.go
index cb8a352a..0dd18efc 100644
--- a/internal/multiagent/eino_single_runner.go
+++ b/internal/multiagent/eino_single_runner.go
@@ -168,11 +168,29 @@ func RunEinoSingleChatModelAgent(
 		},
 		EmitInternalEvents: true,
 	}
+	ins := injectToolNamesOnlyInstruction(ctx, ag.EinoSingleAgentSystemInstruction(), mainTools)
+	if logger != nil {
+		names := collectToolNames(ctx, mainTools)
+		mountedNames := collectToolNames(ctx, mainToolsForCfg)
+		hasToolSearch := false
+		for _, n := range names {
+			if strings.EqualFold(strings.TrimSpace(n), "tool_search") {
+				hasToolSearch = true
+				break
+			}
+		}
+		logger.Info("eino tool-name injection",
+			zap.String("scope", "eino_single"),
+			zap.Int("tool_names", len(names)),
+			zap.Int("mounted_tool_names", len(mountedNames)),
+			zap.Bool("has_tool_search", hasToolSearch),
+		)
+	}
 
 	chatCfg := &adk.ChatModelAgentConfig{
 		Name:          einoSingleAgentName,
 		Description:   "Eino ADK ChatModelAgent with MCP tools for authorized security testing.",
-		Instruction:   ag.EinoSingleAgentSystemInstruction(),
+		Instruction:   ins,
 		Model:         mainModel,
 		ToolsConfig:   mainToolsCfg,
 		MaxIterations: maxIter,
diff --git a/internal/multiagent/eino_tool_name_injection.go b/internal/multiagent/eino_tool_name_injection.go
new file mode 100644
index 00000000..88bb6dfb
--- /dev/null
+++ b/internal/multiagent/eino_tool_name_injection.go
@@ -0,0 +1,73 @@
+package multiagent
+
+import (
+	"context"
+	"strings"
+
+	"github.com/cloudwego/eino/components/tool"
+)
+
+// injectToolNamesOnlyInstruction prepends a compact tool-name-only section into
+// the system instruction so the model can reference current callable names.
+func injectToolNamesOnlyInstruction(ctx context.Context, instruction string, tools []tool.BaseTool) string {
+	names := collectToolNames(ctx, tools)
+	if len(names) == 0 {
+		return strings.TrimSpace(instruction)
+	}
+	hasToolSearch := false
+	for _, n := range names {
+		if strings.EqualFold(strings.TrimSpace(n), "tool_search") {
+			hasToolSearch = true
+			break
+		}
+	}
+
+	var sb strings.Builder
+	sb.WriteString("以下是当前会话中可调用的工具名称列表（仅名称，无参数定义）：\n")
+	for _, name := range names {
+		sb.WriteString("- ")
+		sb.WriteString(name)
+		sb.WriteByte('\n')
+	}
+	sb.WriteString("\n使用规则：\n")
+	sb.WriteString("1) 上述仅为名称列表，不包含参数定义。\n")
+	if hasToolSearch {
+		sb.WriteString("2) 在调用具体工具前，应先使用 tool_search 查看工具详情与参数要求，再发起调用。\n")
+	} else {
+		sb.WriteString("2) 调用具体工具前，请先确认该工具的参数要求；不确定时先澄清再调用。\n")
+	}
+	sb.WriteString("3) 不要臆造不存在的工具名。\n\n")
+	if s := strings.TrimSpace(instruction); s != "" {
+		sb.WriteString(s)
+	}
+	return sb.String()
+}
+
+func collectToolNames(ctx context.Context, tools []tool.BaseTool) []string {
+	if len(tools) == 0 {
+		return nil
+	}
+	seen := make(map[string]struct{}, len(tools))
+	out := make([]string, 0, len(tools))
+	for _, t := range tools {
+		if t == nil {
+			continue
+		}
+		info, err := t.Info(ctx)
+		if err != nil || info == nil {
+			continue
+		}
+		name := strings.TrimSpace(info.Name)
+		if name == "" {
+			continue
+		}
+		key := strings.ToLower(name)
+		if _, ok := seen[key]; ok {
+			continue
+		}
+		seen[key] = struct{}{}
+		out = append(out, name)
+	}
+	return out
+}
+
diff --git a/internal/multiagent/runner.go b/internal/multiagent/runner.go
index 9878f351..79437567 100644
--- a/internal/multiagent/runner.go
+++ b/internal/multiagent/runner.go
@@ -261,10 +261,29 @@ func RunDeepAgent(
 				subHandlers = append(subHandlers, teleMw)
 			}
 
+			subInstrFinal := injectToolNamesOnlyInstruction(ctx, instr, subTools)
+			if logger != nil {
+				subNames := collectToolNames(ctx, subTools)
+				mountedNames := collectToolNames(ctx, subToolsForCfg)
+				hasToolSearch := false
+				for _, n := range subNames {
+					if strings.EqualFold(strings.TrimSpace(n), "tool_search") {
+						hasToolSearch = true
+						break
+					}
+				}
+				logger.Info("eino tool-name injection",
+					zap.String("scope", "sub_agent"),
+					zap.String("agent", id),
+					zap.Int("tool_names", len(subNames)),
+					zap.Int("mounted_tool_names", len(mountedNames)),
+					zap.Bool("has_tool_search", hasToolSearch),
+				)
+			}
 			sa, err := adk.NewChatModelAgent(ctx, &adk.ChatModelAgentConfig{
 				Name:        id,
 				Description: desc,
-				Instruction: instr,
+				Instruction: subInstrFinal,
 				Model:       subModel,
 				ToolsConfig: adk.ToolsConfig{
 					ToolsNodeConfig: compose.ToolsNodeConfig{
@@ -316,6 +335,25 @@ func RunDeepAgent(
 			orchDescription = d
 		}
 	}
+	orchInstruction = injectToolNamesOnlyInstruction(ctx, orchInstruction, mainTools)
+	if logger != nil {
+		mainNames := collectToolNames(ctx, mainTools)
+		mountedNames := collectToolNames(ctx, mainToolsForCfg)
+		hasToolSearch := false
+		for _, n := range mainNames {
+			if strings.EqualFold(strings.TrimSpace(n), "tool_search") {
+				hasToolSearch = true
+				break
+			}
+		}
+		logger.Info("eino tool-name injection",
+			zap.String("scope", "orchestrator"),
+			zap.String("orchestration", orchMode),
+			zap.Int("tool_names", len(mainNames)),
+			zap.Int("mounted_tool_names", len(mountedNames)),
+			zap.Bool("has_tool_search", hasToolSearch),
+		)
+	}
 
 	supInstr := strings.TrimSpace(orchInstruction)
 	if orchMode == "supervisor" {