diff --git a/agent/tools_insert.go b/agent/tools_insert.go
index c1a9973..d442bf2 100644
--- a/agent/tools_insert.go
+++ b/agent/tools_insert.go
@@ -521,45 +521,6 @@ func (t *ToolSet) listAssets() actool.CoreTool {
 	)
 }
 
-// deleteAssetsByHost hard-deletes every asset tied to one host (exact match).
-func (t *ToolSet) deleteAssetsByHost() actool.CoreTool {
-	return writeTool(
-		"delete_assets_by_host",
-		"按 host 精确删除资产：删掉该 host 的域名/子域名，以及其下的服务(service)、接口(endpoint)。\n"+
-			"host 完全匹配(小写、去空格),不是模糊/通配。\n"+
-			"传根域名(如 example.com)会连带删除它的子域名及其服务/接口;传子域名(如 a.example.com)或 IP 只删该 host 自身及其服务/接口。\n"+
-			"⚠️ 硬删除且作用于全局资产库(跨任务共享),不可撤销;请先用 list_assets 确认范围再删。",
-		obj(map[string]any{
-			"host": str("要删除的 host:域名/子域名/IP。完全匹配,如 example.com 或 a.example.com 或 1.2.3.4"),
-		}, "host"),
-		func(_ context.Context, in json.RawMessage) (actool.Result, error) {
-			if t.as == nil {
-				return actool.Errorf("delete_assets_by_host 未启用: AssetStore 未初始化"), nil
-			}
-			var a struct {
-				Host string `json:"host"`
-			}
-			_ = json.Unmarshal(in, &a)
-			if strings.TrimSpace(a.Host) == "" {
-				return actool.Errorf("host 不能为空"), nil
-			}
-			counts, err := t.as.DeleteByHost(a.Host)
-			if err != nil {
-				return actool.Errorf("删除失败: " + err.Error()), nil
-			}
-			var total int64
-			for _, n := range counts {
-				total += n
-			}
-			return jsonResult(map[string]any{
-				"host":            a.Host,
-				"deleted":         total,
-				"deleted_by_type": counts,
-			})
-		},
-	)
-}
-
 // listCompanies lets an agent enumerate companies (企业) with their scope + asset count.
 func (t *ToolSet) listCompanies() actool.CoreTool {
 	return readTool(
diff --git a/server/platform_tools.go b/server/platform_tools.go
index face7d8..1dacf56 100644
--- a/server/platform_tools.go
+++ b/server/platform_tools.go
@@ -23,6 +23,7 @@ func (s *Server) platformTools() []actool.CoreTool {
 		s.toolUpdateCustomTool(),
 		s.toolCreateMCP(),
 		s.toolUpdateMCP(),
+		s.toolDeleteAssetsByHost(),
 	}
 }
 
@@ -31,6 +32,48 @@ var platformToolKeys = []string{
 	"create_skill", "update_skill_file",
 	"create_custom_tool", "update_custom_tool",
 	"create_mcp", "update_mcp",
+	"delete_assets_by_host",
+}
+
+// ---- assets ----
+
+// toolDeleteAssetsByHost hard-deletes every asset tied to one host (exact match).
+// Platform-level (not a per-task tool): operates on the global, cross-task asset库.
+func (s *Server) toolDeleteAssetsByHost() actool.CoreTool {
+	return wrTool("delete_assets_by_host",
+		"按 host 精确删除资产：删掉该 host 的域名/子域名，以及其下的服务(service)、接口(endpoint)。\n"+
+			"host 完全匹配(小写、去空格)，不是模糊/通配。\n"+
+			"传根域名(如 example.com)会连带删除它的子域名及其服务/接口；传子域名(如 a.example.com)或 IP 只删该 host 自身及其服务/接口。\n"+
+			"⚠️ 硬删除、作用于全局资产库(跨任务共享)、不可撤销。",
+		objSchema(map[string]any{
+			"host": strParam("要删除的 host：域名/子域名/IP。完全匹配，如 example.com 或 a.example.com 或 1.2.3.4"),
+		}, "host"),
+		func(_ context.Context, in json.RawMessage) (actool.Result, error) {
+			as := s.assetStore()
+			if as == nil {
+				return actool.Errorf("资产库未初始化"), nil
+			}
+			var a struct {
+				Host string `json:"host"`
+			}
+			_ = json.Unmarshal(in, &a)
+			if strings.TrimSpace(a.Host) == "" {
+				return actool.Errorf("host 不能为空"), nil
+			}
+			counts, err := as.DeleteByHost(a.Host)
+			if err != nil {
+				return actool.Errorf("删除失败: " + err.Error()), nil
+			}
+			var total int64
+			for _, n := range counts {
+				total += n
+			}
+			return jsonResult(map[string]any{
+				"host":            a.Host,
+				"deleted":         total,
+				"deleted_by_type": counts,
+			})
+		})
 }
 
 // ---- skills ----