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concepts/search-and-load.md
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concepts/search-and-load.md
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---
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title: "Search and Load — 精选工具加载"
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created: 2026-06-19
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updated: 2026-06-19
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type: concept
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tags: [tool-selection, search-and-load, dynamic-react, meta-tools]
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sources:
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- https://arxiv.org/abs/2509.20386
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---
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# Search and Load 架构
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## 定义
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Search and Load 是 Dynamic ReAct 五架构实验中的**最优方案**——两阶段(search→load),两次额外 LLM 调用,LLM 精选后通常加载不到 5 个工具。相比全量注入,工具加载减少 50%。
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## 工作流
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```
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用户查询
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│
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▼
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LLM 构造原子化搜索查询(可多个)
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│ 例: ["retrieve Twitter mentions and DMs", "create Google Sheets spreadsheet"]
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▼
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search_tools(queries, k1=20, k2=5)
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├── 每 query 检索 k1=20 候选
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├── 跨 query 去重
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└── 每应用上限 k2=5
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│
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▼
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LLM 分析候选列表 → 精选 < 5 个工具
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│
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▼
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load_tools([精选ID列表]) → 工具绑定到 LLM
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│
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▼
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ReAct Agent 执行(仅加载精选工具)
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```
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## 为什么比前三架构好
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| 架构 | 问题 |
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|------|------|
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| Direct Semantic Search | 噪声严重,跨域失效,需要大 k |
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| Meta-Tool Query Construction | 仍需大 k,无精选步骤 |
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| Application-Aware | 额外 search_apps 调用收益有限 |
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Search and Load 的差异化:
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- **多查询合并**:一次调用覆盖多领域
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- **去重+上限**:k1=20→k2=5 压缩候选
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- **精选加载**:LLM 从候选中选择,而非全加载
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## 与 MCP-Zero 的对比
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| | Search and Load | [[active-tool-discovery|MCP-Zero 主动发现]] |
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|---|---|---|
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| 触发 | LLM 构造搜索查询 | LLM 生成结构化 tool request |
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| 匹配 | 向量语义搜索 | 层次路由(server→tool) |
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| 加载 | LLM 手动精选 | 自动 top-k 注入 |
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## 参考
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- [[dynamic-react|Dynamic ReAct]]
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- [[meta-tools|Meta Tools]]
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- [[gaurav-dynamic-react-2025|论文]]
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