Getting it into your agent
This one installs as part of its plugin. Adding the marketplace and installing the plugin brings it with everything else the plugin ships.
/plugin marketplace add krimto-labs/krimto/plugin install krimtoWrote 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.
[](https://agentmods.dev/hooks/krimto-labs/krimto/pre-tool-use)<a href="https://agentmods.dev/hooks/krimto-labs/krimto/pre-tool-use"><img src="https://agentmods.dev/badge/hooks/krimto-labs/krimto/pre-tool-use/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/hooks/krimto-labs/krimto/pre-tool-use"><img src="https://agentmods.dev/badge/hooks/krimto-labs/krimto/pre-tool-use.svg" alt="Reviewed on agentmods" width="80" height="20"></a>Grade A, and why
PreToolUse 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 10d 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.
What it actually says
{
"PreToolUse": [
{
"matcher": "mcp__krimto__.*",
"hooks": [
{
"type": "command",
"command": "bash \"${CLAUDE_PLUGIN_ROOT}/scripts/validate-scope.sh\""
}
]
}
]
}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.
- 10d ago First seen · 13 lines scan A 46045b794931
PreToolUse is a hook published in the GitHub repository krimto-labs/krimto (6 stars, last pushed 3mo ago), licensed Apache-2.0. 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 2026-08-31.
Other hooks, from other repositories
SessionStart
Runs when a session starts on startup, clear, resume and compact, running thoughtline protocol --event session-start (3 commands). From AgusLoza2021/Thoughtline.
UserPromptSubmit
Runs when you submit a prompt, before the agent sees it, running thoughtline hook user-prompt-submit. From AgusLoza2021/Thoughtline.
PreToolUse
Runs before the agent uses a tool, running thoughtline hook pre-tool-use. From AgusLoza2021/Thoughtline.
PostToolUse
Runs after a tool call finishes, running thoughtline hook post-tool-use. From AgusLoza2021/Thoughtline.
Stop
Runs when the agent finishes a response, running thoughtline hook stop. From AgusLoza2021/Thoughtline.
SessionEnd
Runs when a session ends, running thoughtline hook session-end. From AgusLoza2021/Thoughtline.