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agentmail

Email infrastructure for AI agents. Create accounts, send/receive emails, manage webhooks, and check karma balance via the AgentMail API.

57

Quality

66%

Does it follow best practices?

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SecuritybySnyk

High

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tessl review fix ./skills/agentmail/SKILL.md
SKILL.md
Quality
Evals
Security

Security

1 high severity finding. You should review these findings carefully before considering using this skill.

High

W007: Insecure credential handling detected in skill instructions.

What this means

The skill handles credentials insecurely by requiring the agent to include secret values verbatim in its generated output. This exposes credentials in the agent’s context and conversation history, creating a risk of data exfiltration.

Why it was flagged

The prompt includes examples that embed API keys and webhook secrets directly in curl headers and code (e.g., `Authorization: Bearer am_...`, `apiKey: "am_..."`, and passing a webhook secret to verification), which encourage placing secret values verbatim into commands and generated output.

Report incorrect finding

Low

Low-risk findings.

1 low severity finding. Worth noting, but not necessarily harmful.

Low

W011: Third-party content exposure detected (indirect prompt injection risk).

What this means

The skill exposes the agent to untrusted, user-generated content from public third-party sources, creating a risk of indirect prompt injection. This includes browsing arbitrary URLs, reading social media posts or forum comments, and analyzing content from unknown websites.

Why it was flagged

The skill explicitly ingests and processes inbound, third-party emails and attachments (see "Read inbox" / "Get full message" and the "Sign up for a service and read verification email" workflow that parses detail.bodyText/detail.bodyHtml), and agents are instructed to parse links/codes and act on them, so untrusted user-generated content can influence agent behavior and enable indirect prompt injection.

Repository
sickn33/antigravity-awesome-skills
Audited
Security analysis
Snyk

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