diff --git a/agent/coverage_params_test.go b/agent/coverage_params_test.go
new file mode 100644
index 0000000..1030aec
--- /dev/null
+++ b/agent/coverage_params_test.go
@@ -0,0 +1,46 @@
+package agent
+
+import (
+	"testing"
+
+	actool "github.com/Autumn-27/norma/tool"
+)
+
+// hasRelatedParam reports whether insert_assets' schema still advertises the
+// per-item `related` parameter (properties.assets.items.properties.related).
+func hasRelatedParam(tool actool.CoreTool) bool {
+	props, ok := nestedMap(tool.InputSchema(), "properties", "assets", "items", "properties")
+	if !ok {
+		return false
+	}
+	_, ok = props["related"]
+	return ok
+}
+
+// TestStripCoverageParams verifies the insert_assets `related` param is visible
+// while coverage is on and hidden once it's off, and that stripping never mutates
+// the original tool's schema (deep copy).
+func TestStripCoverageParams(t *testing.T) {
+	ts := NewToolSet(nil, "")
+	insert := ts.insertAssets()
+	if !hasRelatedParam(insert) {
+		t.Fatal("insert_assets 应默认带 related 参数")
+	}
+
+	// Enabled (default): schema unchanged, related still present.
+	ts.SetCoverageEnabled(true)
+	if got := ts.StripCoverageParams([]actool.CoreTool{insert}); !hasRelatedParam(got[0]) {
+		t.Error("覆盖度开启时不应剔除 related 参数")
+	}
+
+	// Disabled: related stripped from the model-facing schema.
+	ts.SetCoverageEnabled(false)
+	out := ts.StripCoverageParams([]actool.CoreTool{insert})
+	if hasRelatedParam(out[0]) {
+		t.Error("覆盖度关闭时应隐藏 related 参数")
+	}
+	// The original tool must be untouched (deep copy, no shared-map mutation).
+	if !hasRelatedParam(insert) {
+		t.Error("StripCoverageParams 不应修改原始 tool 的 schema")
+	}
+}
diff --git a/agent/mainagent.go b/agent/mainagent.go
index 6d4aaca..5f8016a 100644
--- a/agent/mainagent.go
+++ b/agent/mainagent.go
@@ -89,6 +89,7 @@ func (m *MainAgent) Chat(ctx context.Context, taskID int64, as *db.AssetStore, t
 	base := append(tsx.DropCoverageTools(tsx.MainAgentTools()), actool.DefaultTools()...)
 	ctx = WithRunInfo(ctx, RunInfo{TaskID: taskID, ExplorationID: explorationID(ts)})
 	tools, def, cleanup := AugmentTools(ctx, "mainagent", base)
+	tools = tsx.StripCoverageParams(tools) // 覆盖度关闭时隐藏 insert_assets 的 related 入参
 	defer cleanup()
 	// 本任务的工作目录 <workDir>/tasks/<taskID>，先建好。
 	mainDir := ensureRunDir(m.workDir, taskID, 0)
diff --git a/agent/tools.go b/agent/tools.go
index e16b4da..53073d0 100644
--- a/agent/tools.go
+++ b/agent/tools.go
@@ -186,6 +186,60 @@ func (t *ToolSet) DropCoverageTools(tools []actool.CoreTool) []actool.CoreTool {
 	return out
 }
 
+// StripCoverageParams hides coverage-only parameters (currently insert_assets'
+// per-item `related`, which only decides whether an asset enters the coverage
+// denominator) from the model-facing schema when coverage is disabled — the param
+// has no effect then, so showing it just pollutes the prompt. MUST run on the FINAL
+// tool list (after AugmentTools/ToolResolve): the DB tools table is authoritative on
+// schema, so stripping the code schema earlier would be overwritten. No-op when
+// enabled or when the list has no insert_assets. The schema is deep-copied before
+// editing so the shared/DB schema map is never mutated.
+func (t *ToolSet) StripCoverageParams(tools []actool.CoreTool) []actool.CoreTool {
+	if !t.coverageDisabled {
+		return tools
+	}
+	for i, tool := range tools {
+		if tool.Name() != "insert_assets" {
+			continue
+		}
+		schema := deepCopyJSONMap(tool.InputSchema())
+		if props, ok := nestedMap(schema, "properties", "assets", "items", "properties"); ok {
+			delete(props, "related")
+		}
+		tools[i] = DecorateTool(tool, tool.Description(), schema)
+	}
+	return tools
+}
+
+// deepCopyJSONMap returns a JSON round-trip deep copy of a schema map so callers can
+// edit it without touching the original (which may be shared/cached). Falls back to
+// the input on any marshal error (edits then become best-effort no-ops upstream).
+func deepCopyJSONMap(m map[string]any) map[string]any {
+	b, err := json.Marshal(m)
+	if err != nil {
+		return m
+	}
+	var out map[string]any
+	if json.Unmarshal(b, &out) != nil {
+		return m
+	}
+	return out
+}
+
+// nestedMap walks a chain of string keys through nested map[string]any values,
+// returning the final map and whether the whole path resolved to one.
+func nestedMap(m map[string]any, keys ...string) (map[string]any, bool) {
+	cur := m
+	for _, k := range keys {
+		next, ok := cur[k].(map[string]any)
+		if !ok {
+			return nil, false
+		}
+		cur = next
+	}
+	return cur, true
+}
+
 // Cross-task reuse: exported accessors returning the per-task tool logic bound to
 // THIS ToolSet's store. Host-side orchestration tools build a ToolSet for an
 // arbitrary task, then Call these — so cross-task reads/hint reuse the exact
diff --git a/agent/tools_insert.go b/agent/tools_insert.go
index dff7878..9d0eca4 100644
--- a/agent/tools_insert.go
+++ b/agent/tools_insert.go
@@ -62,6 +62,13 @@ type assetInputItem struct {
 	// ---- endpoint ----
 	Method string           `json:"method"`
 	Params []map[string]any `json:"params"`
+
+	// Related marks whether this asset is relevant to the CURRENT test task and
+	// should therefore auto-enter the coverage system (task_scope denominator).
+	// nil = default true (relevant → auto-scoped). false = insert into the shared
+	// asset库 but keep it OUT of this task's coverage. Only consulted when the task
+	// has the coverage feature enabled; ignored (no auto-scope either way) when off.
+	Related *bool `json:"related"`
 }
 
 // insertAssets is the unified insert_assets agent tool.
@@ -150,6 +157,11 @@ func (t *ToolSet) insertAssets() actool.CoreTool {
 						"description": "请求参数列表，每条含 location(query/body/header/path)/name/value/type（可选，追加不覆盖）",
 						"items":       map[string]any{"type": "object"},
 					},
+					// 覆盖度相关：该资产是否与当前测试任务有关。
+					"related": map[string]any{
+						"type":        "boolean",
+						"description": "该资产是否与【当前测试任务】相关：true(默认)才自动纳入资产覆盖度(测试范围分母)；false 则只入库、不计入本任务覆盖度(如顺带发现的旁站/无关资产)。仅在任务开启资产覆盖度功能时生效。",
+					},
 				}, "type"),
 			},
 		}, "assets"),
@@ -274,8 +286,10 @@ func (t *ToolSet) insertAssets() actool.CoreTool {
 				t.anchorOwner(id)
 				// 自动入测试范围(source='auto')：只对 worker 顶层显式插入的这一项，按其
 				// 类型加保守范围；side-effect 派生的资产不经此处，故范围不盲目扩大。taskID=0 时无操作。
-				// 资产覆盖度功能关闭时不再累积测试范围(分母)。
-				if !t.coverageDisabled {
+				// 资产覆盖度功能关闭时不再累积测试范围(分母)；related=false(与当前任务无关)
+				// 的资产也只入库、不计入覆盖度。related 省略/null 视为 true(默认纳入)。
+				related := item.Related == nil || *item.Related
+				if !t.coverageDisabled && related {
 					svcIP := item.ServiceIP
 					if svcIP == "" {
 						svcIP = item.IP
diff --git a/agent/worker.go b/agent/worker.go
index 3d00371..4965e3c 100644
--- a/agent/worker.go
+++ b/agent/worker.go
@@ -269,6 +269,7 @@ func (w *Worker) Execute(ctx context.Context, name string, taskID int64, as *db.
 	base = append(base, actool.DefaultTools()...)
 	ctx = WithRunInfo(ctx, RunInfo{TaskID: taskID, ExplorationID: explorationID(ts), IntentID: intent.ID})
 	tools, def, cleanup := AugmentTools(ctx, "worker", base)
+	tools = tsx.StripCoverageParams(tools) // 覆盖度关闭时隐藏 insert_assets 的 related 入参
 	defer cleanup()
 
 	// 意图 + 全局态势改放【启动 user 消息】(见下方 input)，system 只留静态角色正文
diff --git a/server/orchestration.go b/server/orchestration.go
index 0f52a9c..5ee78f0 100644
--- a/server/orchestration.go
+++ b/server/orchestration.go
@@ -462,7 +462,7 @@ func (s *Server) seedOrchestrationTools() {
 // reaches an old DB otherwise. Preserves each tool's agent binding + enabled flag.
 // Bump the flag whenever these tools' schemas/descriptions change in code.
 func (s *Server) refreshBuiltinToolSchemas() {
-	const flag = "tool_schema_refresh_v5_spawn_seed_intent"
+	const flag = "tool_schema_refresh_v6_insert_assets_related"
 	if v, _, _ := s.m.pg.GetSetting(flag); v == "true" {
 		return
 	}
@@ -473,10 +473,14 @@ func (s *Server) refreshBuiltinToolSchemas() {
 			log.Printf("[tools] refresh %s schema failed: %v", t.Name(), err)
 		}
 	}
-	// 同时把 planner 的 goal_met 描述刷成代码默认：旧库 seed 的描述带“结束本轮规划”的
-	// 误导，会让 planner 把 goal_met 当成“结束空轮”的手段、刚开跑就误判整个任务完成。
+	// 同时把部分内置 agent 工具刷成代码默认：
+	//   - goal_met：旧库 seed 的描述带“结束本轮规划”的误导，会让 planner 把它当成
+	//     “结束空轮”的手段、刚开跑就误判整个任务完成。
+	//   - insert_assets：新增 related 入参(标记资产是否与当前任务相关、决定是否入覆盖度)，
+	//     SeedTool 首插入only，旧库已 seed 的 schema 否则收不到这个新参数。
+	refreshBuiltin := map[string]bool{"goal_met": true, "insert_assets": true}
 	for _, sd := range agent.BuiltinToolSeeds() {
-		if sd.Key != "goal_met" {
+		if !refreshBuiltin[sd.Key] {
 			continue
 		}
 		schema, _ := json.Marshal(sd.Schema)