Add Hosted Key
simstudioai/sim
Add hosted API key support to a tool so Sim provides the key (metered and billed to the workspace) when a user has not brought their own.
FREE — Intelligent tool-call reliability wrapper. An agent skill from sickn33/agentic-awesome-skills.
Install Tool Use Guardian
$ npx skills add sickn33/agentic-awesome-skills --skill tool-use-guardian -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install sickn33/agentic-awesome-skills tool-use-guardian --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/sickn33/agentic-awesome-skills.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/tool-use-guardian .claude/skills/tool-use-guardian && rm -rf skills-srcUse ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.
Claude Code skills documentation · loads skills from .claude/skills/
Install the "tool-use-guardian" agent skill from https://github.com/sickn33/agentic-awesome-skills/tree/main/skills/tool-use-guardian into .claude/skills/tool-use-guardian/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "tool-use-guardian", then confirm the skill loads.Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$skill-installer install https://github.com/sickn33/agentic-awesome-skills/tree/main/skills/tool-use-guardianType this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.
$ npx skills add sickn33/agentic-awesome-skills --skill tool-use-guardian -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install sickn33/agentic-awesome-skills tool-use-guardian --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/sickn33/agentic-awesome-skills.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/tool-use-guardian .agents/skills/tool-use-guardian && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "tool-use-guardian" agent skill from https://github.com/sickn33/agentic-awesome-skills/tree/main/skills/tool-use-guardian into .agents/skills/tool-use-guardian/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "tool-use-guardian", then confirm the skill loads.Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add sickn33/agentic-awesome-skills --skill tool-use-guardian -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install sickn33/agentic-awesome-skills tool-use-guardian --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/sickn33/agentic-awesome-skills.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/tool-use-guardian .cursor/skills/tool-use-guardian && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "tool-use-guardian" agent skill from https://github.com/sickn33/agentic-awesome-skills/tree/main/skills/tool-use-guardian into .cursor/skills/tool-use-guardian/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "tool-use-guardian", then confirm the skill loads.Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gemini skills install https://github.com/sickn33/agentic-awesome-skills.git --path skills/tool-use-guardian--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add sickn33/agentic-awesome-skills --skill tool-use-guardian -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install sickn33/agentic-awesome-skills tool-use-guardian --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/sickn33/agentic-awesome-skills.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/tool-use-guardian .gemini/skills/tool-use-guardian && rm -rf skills-srcUse ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.
Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/
Install the "tool-use-guardian" agent skill from https://github.com/sickn33/agentic-awesome-skills/tree/main/skills/tool-use-guardian into .gemini/skills/tool-use-guardian/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "tool-use-guardian", then confirm the skill loads.Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gh skill install sickn33/agentic-awesome-skills tool-use-guardianInstalls for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).
$ npx skills add sickn33/agentic-awesome-skills --skill tool-use-guardian -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/sickn33/agentic-awesome-skills.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/tool-use-guardian .github/skills/tool-use-guardian && rm -rf skills-srcUse ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.
GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/
Install the "tool-use-guardian" agent skill from https://github.com/sickn33/agentic-awesome-skills/tree/main/skills/tool-use-guardian into .github/skills/tool-use-guardian/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "tool-use-guardian", then confirm the skill loads.GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add sickn33/agentic-awesome-skills --skill tool-use-guardian -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install sickn33/agentic-awesome-skills tool-use-guardian --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/sickn33/agentic-awesome-skills.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/tool-use-guardian .opencode/skills/tool-use-guardian && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "tool-use-guardian" agent skill from https://github.com/sickn33/agentic-awesome-skills/tree/main/skills/tool-use-guardian into .opencode/skills/tool-use-guardian/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "tool-use-guardian", then confirm the skill loads.OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
Facts
- Skill name
tool-use-guardian- GitHub stars
- 47k
- Used in
- 2 other repos
- Token cost
- ~849 tokens
- SKILL.md length
- 371 words
- Files
- 1
- Skills in repo
- 1,497
- Repo updated
- First seen
- Licence
- MIT
At a glance
FREE — Intelligent tool-call reliability wrapper. An agent skill from sickn33/agentic-awesome-skills.
- Works in 4 steps: Pre-Call Validation → Failure Classification → Chain Protection → …
- Tasks that involve Rate limiting
- SKILL.md covers Overview, Install, When to Use This Skill and How It Works, plus 4 more sections
- Calls npx
What it does
Tool Use Guardian is an agent skill from sickn33/agentic-awesome-skills. FREE — Intelligent tool-call reliability wrapper. Monitors, retries, fixes, and learns from tool failures. Auto-recovers from truncated JSON, timeouts, rate limits, and mid-chain failures.
Its SKILL.md is about 850 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.
It sits in Backend & APIs, covering Rate limiting. The repository describes itself as: AAS Core is the local, agent-first control plane for complete catalog discovery, agent-owned selection, stack validation, and planning, backed by 2,400+ agentic skills. Includes… The licence is MIT.
When your agent uses it
- Tasks that involve Rate limiting
Example prompts
- “/tool-use-guardian”
Requirements
- Node.js
Workflow steps
4 steps, taken from the step headings in SKILL.md.
What it can do on your machine
Read from SKILL.md and the folder at commit b84d35a. It shows what the files ask for, not the result of running them.
Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
Shell commands in SKILL.md call:
npx
From the folder's file list and the shell code blocks in SKILL.md.
Network
Links to these hosts (documentation or services it may open):
github.comgenesis-node-api.vercel.appgenesis-marketplace.vercel.app
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.
Context cost
Tool Use Guardian loads about 849 tokens when it runs. Until then it costs about 52 tokens; SKILL.md has 371 words of instructions outside code blocks.
Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.
Safety
Auto-check passed
The automated check found no risky patterns in SKILL.md.
Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.
SKILL.md
The full file from sickn33/agentic-awesome-skills at commit b84d35a, republished under its MIT licence (© sickn33). 371 words, ~849 tokens.
Download SKILL.mdSave it as
.claude/skills/tool-use-guardian/SKILL.md (or your agent's skills folder).- name
- tool-use-guardian
- description
- FREE — Intelligent tool-call reliability wrapper. Monitors, retries, fixes, and learns from tool failures. Auto-recovers from truncated JSON, timeouts, rate limits, and mid-chain failures.
- category
- reliability
- risk
- safe
- source
- community
- date_added
- 2026-03-13
- author
- christopherlhammer11-ai
- tags
- reliability, tool-use, error-handling, retries, recovery, agent-infrastructure
- tools
- claude, cursor, codex, gemini, copilot, windsurf, antigravity
Tool Use Guardian
Overview
The reliability wrapper every AI agent needs. Monitors tool calls, auto-retries failures, fixes truncated responses, and learns which tools are unreliable — so you never lose your chain of thought.
Free forever. Built by the Genesis Agent Marketplace.
Install
npx skills add christopherlhammer11-ai/tool-use-guardianWhen to Use This Skill
- Use when tool calls return truncated or malformed JSON
- Use when APIs timeout or rate-limit your agent mid-task
- Use when a multi-step chain breaks partway through
- Use when you need automatic retry logic without writing it yourself
- Use for any agent workflow that depends on external tool reliability
How It Works
Step 1: Pre-Call Validation
Before every tool call, Guardian validates:
- Required parameters are present and correctly typed
- The tool is not marked as "unreliable" from previous failures
- Request size is within known limits
Step 2: Failure Classification
When a tool call fails, Guardian classifies the failure into one of 9 categories:
| Failure Type | Recovery Action |
|---|---|
| Truncated JSON | Re-fetch with pagination or smaller chunks |
| API Timeout | Retry once with simpler request, then decompose |
| Rate Limit (429) | Exponential backoff, max 3 retries |
| Auth Expired | Flag for user intervention |
| Mid-chain Break | Resume from last successful checkpoint |
| Error-as-200 | Detect {"error": "..."} disguised as success |
| Schema Mismatch | Attempt auto-coercion, warn if lossy |
| Network Failure | Retry with jitter, max 2 attempts |
| Unknown Error | Log full context, escalate to user |
Show full SKILL.md (151 more words)Show less
Step 3: Chain Protection
For multi-step tool chains, Guardian maintains checkpoints. If step 4 of 7 fails, it resumes from step 4 — never restarts from scratch.
Step 4: Learning
Guardian tracks failure patterns per tool. After 3+ failures of the same type, it marks the tool as unreliable and suggests alternatives.
Best Practices
- ✅ Let Guardian wrap all external tool calls automatically
- ✅ Review Guardian's reliability reports to identify flaky tools
- ✅ Use checkpoint recovery for long chains
- ❌ Don't disable retry logic for rate-limited APIs
- ❌ Don't ignore repeated failure warnings
Related Skills
@recallmax- Long-context memory enhancement (also free from Genesis Marketplace)
Links
- Repo: https://github.com/christopherlhammer11-ai/tool-use-guardian
- Marketplace: https://genesis-node-api.vercel.app
- Browse skills: https://genesis-marketplace.vercel.app
Limitations
- Use this skill only when the task clearly matches the scope described above.
- Do not treat the output as a substitute for environment-specific validation, testing, or expert review.
- Stop and ask for clarification if required inputs, permissions, safety boundaries, or success criteria are missing.
© sickn33, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file
Files
Just SKILL.md in skills/tool-use-guardian of sickn33/agentic-awesome-skills.
Open the folder on GitHubat commit b84d35a
Used in 2 other repositories
We found 11 copies of this SKILL.md (exact, near-identical or edited) in other folders, from 2 other GitHub owners. This page covers the copy in sickn33/agentic-awesome-skills, which our catalogue first saw on October 9, 2026.
Compare with similar skills
Tool Use Guardian next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| Tool Use Guardian this skillsickn33/agentic-awesome-skills | 47k | 2 repos | ~849 | Automated safety check: Pass | MIT | |
| Add Hosted Keysimstudioai/sim | 30k | — | ~3.4k | Automated safety check: Pass | Apache-2.0 | |
| Upstash Ratelimit TSupstash/ratelimit-js | 2k | — | ~313 | Automated safety check: Pass | MIT | |
| Repo2skillzhangyanxs/repo2skill | 246 | — | ~3.6k | Automated safety check: Pass | None | |
| Better Auth Security Best PracticesEpicenterHQ/epicenter | 4.8k | — | ~896 | Automated safety check: Pass | Custom licence | |
| Dload Fetch Toolphp-internal/dload | 105 | — | ~1.1k | Automated safety check: Pass | BSD-3-Clause |
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Convert GitHub/GitLab/Gitee repositories into comprehensive OpenCode Skills using embedded LLM calls with multiple mirrors and rate limit handling
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Questions about Tool Use Guardian
What does Tool Use Guardian do?
FREE — Intelligent tool-call reliability wrapper. An agent skill from sickn33/agentic-awesome-skills. Tool Use Guardian is an agent skill from sickn33/agentic-awesome-skills. FREE — Intelligent tool-call reliability wrapper.
When should I use Tool Use Guardian?
Tool Use Guardian fits situations like: tasks that involve Rate limiting.
How do I install Tool Use Guardian in Claude Code?
Run `npx skills add sickn33/agentic-awesome-skills --skill tool-use-guardian -a claude-code`. Or copy the skill folder (skills/tool-use-guardian in sickn33/agentic-awesome-skills) into .claude/skills/tool-use-guardian in your project. Claude Code loads it when a task matches its description.
How do I install Tool Use Guardian in Codex?
Run `npx skills add sickn33/agentic-awesome-skills --skill tool-use-guardian -a codex`. Or copy the skill folder (skills/tool-use-guardian in sickn33/agentic-awesome-skills) into .agents/skills/tool-use-guardian in your project. Codex loads it when a task matches its description.
Can I use Tool Use Guardian in Cursor, Gemini CLI or GitHub Copilot?
Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add sickn33/agentic-awesome-skills --skill tool-use-guardian -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/tool-use-guardian, .gemini/skills/tool-use-guardian, .github/skills/tool-use-guardian and .opencode/skills/tool-use-guardian in your project.
What does Tool Use Guardian need to run?
Going by SKILL.md and its folder, Tool Use Guardian needs the command-line tools its instructions call (npx). Our summary lists: Node.js.
Does Tool Use Guardian access the network?
SKILL.md names 3 domains. As links in the text: github.com, genesis-node-api.vercel.app and genesis-marketplace.vercel.app. This is read from the text; nothing was executed.
Is Tool Use Guardian safe to install?
Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.
What licence does Tool Use Guardian use?
Tool Use Guardian is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.
How many tokens does Tool Use Guardian use?
About 849 tokens (SKILL.md is roughly 3.4k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.
What are the alternatives to Tool Use Guardian?
Skills that share tags, products or a category with Tool Use Guardian: Add Hosted Key (simstudioai/sim, 30k stars), Upstash Ratelimit TS (upstash/ratelimit-js, 2k stars), Repo2skill (zhangyanxs/repo2skill, 246 stars) and Better Auth Security Best Practices (EpicenterHQ/epicenter, 4.8k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Tool Use Guardian?
sickn33 (a GitHub user) maintains it in sickn33/agentic-awesome-skills, which has 47,405 GitHub stars. The repository holds 1,497 skills in this directory. The repository was last updated on October 9, 2026.
Source: sickn33/agentic-awesome-skills on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.