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CD ZeroEx Swap Skill

⚠️ SECURITY WARNING: This skill involves real funds. Review all parameters before executing swaps.

modbender/skill-library-mcp Agent Skills author: modbender MIT 5 files body ≈ 676 tokens Open the sourcegithub.com↗ analyzed 2 d ago

⚠️ SECURITY WARNING: This skill involves real funds.

As a process D 49/100 · Unfinished process — weak spots: result and completion, when it triggers, inputs and preconditions

AnalyzerData and analyticstype and topics are labelled automatically from the skill text
Runs in: OpenClaw Claude / Claude Code ChatGPT / Codex Gemini CLI Cursor GitHub Copilot / VS Code Qwen Code Kimi Code CLI Z.ai (GLM) DeepSeek (Deep Code) Mistral Vibe LangChain (deepagents) Goose OpenCode
JSON
Technical rating
C
74/100
safety, quality, tests
Safety 60%
81
Quality 40%
64
Run on models
none yet
Process rating
D
49/100
Unfinished process
Result and completion w 14
0
Inputs and preconditions w 11
0
Failures and branches w 10
0
the three weakest of ten parameters · all ten

What is at stake

Medium-severity findings: the skill is probably honest, but read what alarmed the scanner.

Risky intent medium severity

Below is the worst case for this category. The finding here is medium: the guard saw a sign, not a proof.

If you install

The purpose itself is risky: wallets, browser password stores, offensive security. Even an honest implementation gives the agent access to things that cost money.

For the author

Explain in the description why the access is needed and how it is limited; add tests that show refusals on dangerous requests.

How to improve

  1. Say in the description WHEN to use the skill ("use when…", example requests): that is the agent's main cue.
For the model run — optional
  • Your own cases (evals/evals.json, 4–6 real requests with expected answers): the full check would then run those instead of a model-drafted suite.
  • A spec.yaml with trigger phrases and assertions — a behaviour contract for CI; `skilltest init` writes a template.

Guard findings · 11

✓ No critical or high findings

Medium and low: 11
  • medium Risky intent intent-wallet-secrets SKILL.md:22
    Handles crypto-wallet secrets (seed / mnemonic / private key) — a classic stealer target
    | `PRIVATE_KEY` | Wallet private key (hex, without 0x prefix) | Yes |
  • medium Risky intent intent-wallet-secrets swap.js:8
    Handles crypto-wallet secrets (seed / mnemonic / private key) — a classic stealer target
    * - PRIVATE_KEY: Wallet private key (hex without 0x prefix)
  • low Secrets in code secret-high-entropy-token quote.js:26
    High-entropy token-like string (may be an id, hash or a credential) (quoted — discussed, not commanded)
    WETH: '0xC0…Cc2',
    quoted
  • low Secrets in code secret-high-entropy-token quote.js:27
    High-entropy token-like string (may be an id, hash or a credential) (quoted — discussed, not commanded)
    USDC: '0xA0…B48',
    quoted
  • low Secrets in code secret-high-entropy-token quote.js:28
    High-entropy token-like string (may be an id, hash or a credential) (quoted — discussed, not commanded)
    DAI: '0x6B…d0F'
    quoted
  • low Secrets in code secret-high-entropy-token quote.js:32
    High-entropy token-like string (may be an id, hash or a credential) (quoted — discussed, not commanded)
    USDC: '0x83…913',
    quoted
  • low Secrets in code secret-high-entropy-token quote.js:33
    High-entropy token-like string (may be an id, hash or a credential) (quoted — discussed, not commanded)
    DAI: '0x50…0Cb'
    quoted
  • low Secrets in code secret-high-entropy-token swap.js:26
    High-entropy token-like string (may be an id, hash or a credential) (quoted — discussed, not commanded)
    USDC: '0x83…913'
    quoted
  • low Secrets in code secret-high-entropy-token swap.js:29
    High-entropy token-like string (may be an id, hash or a credential) (quoted — discussed, not commanded)
    WETH: '0xC0…Cc2',
    quoted
  • low Secrets in code secret-high-entropy-token swap.js:30
    High-entropy token-like string (may be an id, hash or a credential) (quoted — discussed, not commanded)
    USDC: '0xA0…B48'
    quoted
  • low Risky intent intent-wallet-secrets swap.js:173
    Handles crypto-wallet secrets (seed / mnemonic / private key) — a classic stealer target (detector / deny-list definition)
    console.log('  PRIVATE_KEY: Your wallet private key');
    detector

Files scanned: 5. Evidence is masked. Grey chips explain why severity was lowered.

Against the Agent Skills spec

  • warning name-format name should be kebab-case (lowercase letters, digits, hyphens)
  • warning description-no-when description does not say WHEN to use the skill (no "use when")

Process rating: all ten parameters 49/100

  • 0Result and completion. Does not say what the result is
  • 0Inputs and preconditions. Does not say what the process needs to start
  • 0Failures and branches. Linear process with no failure handling
  • 0Progress reporting. Says nothing while it works
  • 20When it triggers. No condition that starts the skill
  • 40Consistency. Frontmatter name (ZeroEx Swap Skill) differs from the folder (zeroex-swap)
  • 100Tools and files. No external tools needed
  • 100Steps. 7 steps
  • 100Execution cost. Instruction body is 676 tokens
  • 100Running it twice. No mutating operations
  • medium Safety rules and hard prohibitions inside a skill: they belong in the system prompt, here they protect nothing

Everything here is measured from the skill text rather than judged by a model, so the numbers are checkable. A parameter weighs more when it is a more common reason for the process to stall.

Quality signals

  • +5Description has no quoted example phrases that should trigger the skill
  • +4Description does not say when NOT to use the skill (false activations)
  • +3Description length 98: 120–800 characters recommended
  • +3Output format is not stated: the model decides each time
  • +1No license
  • +2Single-language instructions
  • +4Structure: 15 headings
  • +3Step-by-step instructions: 7 items
  • +4Has examples (10 code blocks)

Quality base 70; lint remarks subtract, signals add up to 100. Result: 64.