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 skills add 45ck/skill-harness --skill tool-permission-plannergit clone --depth 1 https://github.com/45ck/skill-harnessWrote 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/skills/45ck/skill-harness/tool-permission-planner)<a href="https://agentmods.dev/skills/45ck/skill-harness/tool-permission-planner"><img src="https://agentmods.dev/badge/skills/45ck/skill-harness/tool-permission-planner/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/skills/45ck/skill-harness/tool-permission-planner"><img src="https://agentmods.dev/badge/skills/45ck/skill-harness/tool-permission-planner.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What 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 5.1 | $0.00033 | $0.00283 |
| Opus 5.5 | $0.00013 | $0.00113 |
| Sonnet 5.5 | $0.00007 | $0.00057 |
| Haiku 4.5 | $0.00003 | $0.00028 |
Grade A, and why
tool-permission-planner 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 1mo 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
Tool Permission Planner
Use this skill when an agent needs tools beyond local read-only reasoning.
Process
- Start from user task outcomes, not endpoint completeness.
- List each tool, its side effects, and the data it can expose.
- Choose read-only or dry-run modes first when they can prove the next step.
- Define command, path, network, account, and write boundaries.
- Name approval gates for destructive or externally visible actions.
- Define audit evidence: logs, issue comments, manifests, screenshots, traces, or command output.
Permission Tiers
read: inspect files, issues, docs, metadata, screenshotswrite-local: edit repo files or generated artifactsexecute-local: run tests, builds, formatters, or local validatorsexternal-read: call APIs or remote systems without mutationexternal-write: create, update, publish, deploy, merge, or notifydestructive: delete, revoke, reset, drop, overwrite, or irreversibly mutate
Output
Tool Surface
Minimum Required Tier
Boundaries
Approval Gates
Audit Evidence
Denied Capabilities
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.
- 1mo ago First seen · 36 lines · 33 tokens per session scan A 2582b7b3c8ef
tool-permission-planner is a skill published in the GitHub repository 45ck/skill-harness (15 stars, last pushed 4mo ago), licensed MIT. It adds 33 tokens to every session and 283 once invoked, about $0.0001 per session on Opus 5.5. 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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do-it-review
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do-it-code-quality
Use when designing, changing, or debugging code to locate causal ownership and close the affected behavior.