PostToolUseFailure

PostToolUseFailure is a hook for Claude Code from ThalesGroup/agilab. Its token cost is not measured, scanned A, original, no licence file.

An event hook that runs a Tokki command after a coding-agent tool call fails.

In plain words
What is it for?
It helps record or process tool errors after they occur.
Why use it?
It captures failed tool calls automatically, making those failures available to Tokki's event-ingestion workflow.

Hook for Claude Code

One of 16 entries in settings.json — they are configured in one file and arrive together.

Install

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.

agentmods
npx agentmods add hooks/thalesgroup/agilab/post-tool-use-failure
Clone the repo
git clone --depth 1 https://github.com/ThalesGroup/agilab

Made for: Claude Code.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for PostToolUseFailure

README.md
[![agentmods](https://agentmods.dev/badge/hooks/thalesgroup/agilab/post-tool-use-failure.svg)](https://agentmods.dev/hooks/thalesgroup/agilab/post-tool-use-failure)
Your own site
<a href="https://agentmods.dev/hooks/thalesgroup/agilab/post-tool-use-failure"><img src="https://agentmods.dev/badge/hooks/thalesgroup/agilab/post-tool-use-failure.svg" alt="Measured on agentmods" height="20"></a>
Per session not measured What this adds to a session before it is invoked.
When invoked not measured Not applicable: nothing here is loaded into a session.
Security scan A 0 findings. Scan, not verified.
Origin unknown No closer match found in the catalogue.
Security

Grade A, and why

PostToolUseFailure 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 5d ago.

A static scan of the commands this hook runs, not an audit. A hook is shell that executes on your machine at the event it names, which is why every command in it is printed with what was found.

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.

.claude/settings.json · 13 lines

The source is not reproduced here

A licence we could not identify

The repository carries a LICENSE file, but it is custom or dual enough that GitHub cannot name it and neither can this catalogue. Unknown terms are not permission, so the body is not copied here. Read the licence at the source and decide for yourself.

Read it on GitHub

Changes

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.

  1. 5d ago First seen · 13 lines scan A e9059f747a53

Subscribe to this mod's changes

PostToolUseFailure is a hook published in the GitHub repository ThalesGroup/agilab (21 stars, last pushed today), with no licence file. Its token cost is not measured: a hook is shell that never enters the context. 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.