Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx agentmods add agents/xt765/langchain-chinese-comment/toolsgit clone --depth 1 https://github.com/xt765/LangChain-Chinese-CommentWhat it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5 | $0.00000 | $0.00400 |
| Opus 5 | $0.00000 | $0.00200 |
| Sonnet 5 | $0.00000 | $0.00080 |
| Haiku 4.5 | $0.00000 | $0.00040 |
Grade A, and why
tools scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 3d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
What it actually says
libs\langchain\langchain_classic\agents\tools.py
此文档提供了 libs\langchain\langchain_classic\agents\tools.py 文件的详细中文注释。该模块定义了代理在遇到错误时使用的特殊工具。
功能描述
在代理的执行过程中，模型有时会产生幻觉，调用一个并不存在的工具。为了防止程序直接崩溃，LangChain 提供了一个专门的辅助工具来引导模型修正错误。
核心类：InvalidTool
InvalidTool 是一个容错工具，当 AgentExecutor 无法找到模型请求的工具时，会调用此类。
1. 核心属性
name:invalid_tooldescription: 当工具名无效时调用，用于向模型建议正确的工具名。
2. 运行逻辑
无论同步还是异步执行，该工具都会执行以下逻辑：
- 接收无效的工具名
requested_tool_name和可用工具列表available_tool_names。 - 返回一段描述性文字，指出请求无效，并列出所有可用的选项。
示例返回:
google_searchis not a valid tool, try one of [search,calculator].
意义与作用
- 增强鲁棒性: 防止因模型幻觉导致的执行中断。
- 反馈机制: 将错误作为一种“观察结果”（Observation）反馈给模型，让模型有机会在下一次“思考”（Thought）中修正自己的行为。
导出组件
InvalidTool: 异常处理工具类。tool: 装饰器，用于将普通的 Python 函数快速转换为 LangChain 工具。
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 3d ago First seen · 36 lines · 0 tokens per session scan A 43e6964f0f0c
tools is an agent published in the GitHub repository xt765/LangChain-Chinese-Comment (20 stars, last pushed 1mo ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 400 tokens. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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