io.github.adlai88/simmer-mcp

What we checked

Six static checks, weighted by risk. Every result reflects only what could be observed in the published package and repository — never intent.

• Injection surface

  unscannable25% of grade

  Tool descriptions/manifest scanned for instruction-injection patterns (imperatives at the model, hidden text, 'ignore previous', data-exfil URLs).

  No tool descriptions, server instructions, prompts, or resources were fetched; nothing to scan for injection.

• Supply chain

  fail25% of grade

  Package provenance: namespace verification, repo linkage, maintainer count, account age, postinstall scripts, typosquat distance.

  Python build script executes at build time: subprocess in build script

• Credential hygiene

  warn15% of grade

  How the server takes secrets (env vs plaintext config vs hardcoded); secrets appearing in tool schemas.

  bundled-skills/preflight/tests/test_preflight.py: assigns a literal to api_key (sk_l…st (len 12)) — non-provider secret literal; prefer environment intake. Reads secrets from the environment (e.g. bundled-skills/polymarket-ai-divergence/ai_divergence.py) — the recommended intake shape.

• Permission scope

  warn15% of grade

  Declared tools vs. breadth (filesystem, network, exec); flags shell-exec and unbounded filesystem access.

  discloses broad/destructive filesystem access: bundled-skills/polymarket-elon-tweets/elon_tweets.py: open(…, 'w'/'a'/'x') write-mode file access discloses broad/destructive filesystem access: bundled-skills/polymarket-fast-scaler/fast_scaler.py: open(…, 'w'/'a'/'x') write-mode file access discloses broad/destructive filesystem access: bundled-skills/polymarket-fast-loop/fastloop_trader.py: open(…, 'w'/'a'/'x') write-mode file access discloses broad/destructive filesystem access: bundled-skills/polymarket-market-maker/market_maker.py: open(…, 'w'/'a'/'x') write-mode file access discloses broad/destructive filesystem access: bundled-skills/polymarket-signal-sniper/signal_sniper.py: open(…, 'w'/'a'/'x') write-mode file access discloses broad/destructive filesystem access: bundled-skills/kalshi-weather-trader/scripts/status.py: path traversal ('../') combined with file access discloses broad/destructive filesystem access: bundled-skills/polymarket-ai-divergence/scripts/status.py: path traversal ('../') combined with file access discloses broad/destructive filesystem access: bundled-skills/polymarket-copytrading/scripts/status.py: path traversal ('../') combined with file access discloses broad/destructive filesystem access: bundled-skills/polymarket-elon-tweets/scripts/status.py: path traversal ('../') combined with file access discloses broad/destructive filesystem access: bundled-skills/polymarket-mert-sniper/scripts/status.py: path traversal ('../') combined with file access discloses broad/destructive filesystem access: bundled-skills/polymarket-signal-sniper/scripts/status.py: path traversal ('../') combined with file access discloses broad/destructive filesystem access: bundled-skills/polymarket-wallet-xray/scripts/status.py: path traversal ('../') combined with file access discloses broad/destructive filesystem access: bundled-skills/polymarket-weather-trader/scripts/status.py: path traversal ('../') combined with file access discloses broad/destructive filesystem access: bundled-skills/simmer-skill-builder/scripts/status.py: path traversal ('../') combined with file access discloses broad/destructive filesystem access: bundled-skills/prediction-trade-journal/tradejournal.py: open(…, 'w'/'a'/'x') write-mode file access discloses broad/destructive filesystem access: bundled-skills/polymarket-weather-trader/weather_trader.py: path traversal ('../') combined with file access Capability DISCLOSURE, not a verdict: static analysis sees the primitive is present and reachable, not whether its use is attacker-controlled.

• Version behavior

  unscannable10% of grade

  Diff of tool definitions between versions; new permissions or changed descriptions in a patch release (the postmark-mcp class).

  no prior version to diff (first sight of io.github.adlai88/[email protected]); version-drift / rug-pull cannot be evaluated. Cold-start risk is covered by point-in-time checks (injection_surface, supply_chain, credential_hygiene), not here.

• Transport config

  warn10% of grade

  Remote servers: TLS and auth mode (none/token/OAuth). Local servers: whether the manifest indicates it phones home.

  manifest/source references tracking behavior — disclosure