tool-call-permission-gate SKILL.md skillA
tool-call-permission-gate from mrmps/classifier-dev is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add mrmps/classifier-dev/tool-call-permission-gate@git:20260919.33ae531Pins git:20260919.33ae531 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- mrmps/classifier-dev
- Path
skills/tool-call-permission-gate/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260919.33ae531, committed Sep 19, 2026
- Size
- 5,995 bytes
- Repository stars
- 436
- License
- MIT
A second opinion on every shell, file and MCP call a coding agent proposes: classify what it would do, refuse the confidently destructive ones, and attach the reason to the confirmation the person already sees, with the command redacted first. Use when setting up a PreToolUse hook.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# A second opinion on every tool call
An allowlist matches strings: `rm -rf build` and `rm -fr ./build` are one act
in two spellings. Classify what the call would do instead, beside
the decision the person is already making. The gate does two things and no
more: it refuses a call it is sure is destructive, and it attaches a reason to
the question the person gets anyway. An automatic yes is opt-in, below.
## What leaves the machine
One string per call: the tool name and its arguments, redacted, cut to 2,000
characters. No file contents, no environment, no repository name. Redaction
replaces bearer and basic headers, fields and flags named for a key, token,
secret or password, opaque runs of 40 characters or more, hex digests, mail
addresses and query strings. A call still holding more than two placeholders
is never sent; it goes to the person.
in Bash: curl -H "authorization: Bearer tok_9f2a" https://api.example.com/orders?key=9f2a
out Bash: curl -H "authorization: Bearer [redacted]" https://api.example.com/orders?[redacted]
tool gate: ask - read only, changes nothing 0.99
in Bash: deploy --token tok_9f2a --secret s3cr3t --user ops@example.com
…Read the whole file at its exact version.
How to install
mdr add mrmps/classifier-dev/tool-call-permission-gate@sha256:8b6723589b082f55The line at the top of this page pins the label git:20260919.33ae531, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_lkhrmahbngqnnswp)
1 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 1 version of this file, committed on Sep 19, 2026.
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 (5995 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
mrmps/classifier-dev · 436 stars · license MIT · pushed 2026-11-06 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_lkhrmahbngqnnswp GET https://markdownregistry.com/api/v1/resolve?ref=mrmps/classifier-dev/tool-call-permission-gate GET https://markdownregistry.com/api/v1/blob/8b6723589b082f55b6bd577ad5a956dbecc9e126c65f6dbfda13a627a6de9c82
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.