agent-tool-builder skillA
agent-tool-builder is agent-read markdown (skill) from simbajigege/book2skills: Define agent tools using the fail-closed design pattern — unified name/schema/security/execution in one class, with three-layer execution (validate → permission → call). Use this skill whenever the user wants to define a new agent tool, add permission or validation logic to an existing tool, or asks about 'build a tool', '定义一个工具', 'create a tool for X', '工具定义'. Framework-agnostic: works with hermes-agent, LangChain, or any Python agent framework..
Indexed from public GitHub and served as immutable, content-addressed versions. Install it pinned to an exact SHA-256 with the mdr CLI, and every file is verified against the hash recorded here before it reaches your agent. The deterministic audit below grades the latest version, and the same file always earns the same grade.
How to install
mdr add simbajigege/book2skills/agent-tool-builder@git:20260612.4cde403mdr add simbajigege/book2skills/agent-tool-builder@sha256:65e39fc47093b637Pin to a label to follow the author's releases, or to a sha256 to freeze the exact bytes forever. Either way the resolved hash is written to mdr.lock, and mdr install reproduces it on any machine.
[](https://markdownregistry.com/a/art_t6b5q6e6d264plbj)
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Versions
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260612.4cde403 latest | 2026-06-12 | 4cde403 | 8,531 B | A | view · diff |
| git:20260612.cf2f218 | 2026-06-12 | cf2f218 | 8,529 B | A | view |
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (8531 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
simbajigege/book2skills · 158 stars · license MIT · pushed 2026-08-26 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_t6b5q6e6d264plbj GET https://markdownregistry.com/api/v1/resolve?ref=simbajigege/book2skills/agent-tool-builder GET https://markdownregistry.com/api/v1/blob/65e39fc47093b6376bf21b2e50191dc477995bceb00c49f38583af7f9b3df1c2