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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?

Impact

No eval scenarios have been run

SecuritybySnyk

Risky

Do not use without reviewing

Optimize this skill with Tessl

npx tessl skill review --optimize ./plugins/antigravity-awesome-skills-claude/skills/agentmail/SKILL.md
SKILL.md
Quality
Evals
Security

Quality

Content

64%

Reviews the quality of instructions and guidance provided to agents. Good implementation is clear, handles edge cases, and produces reliable results.

This is a solid, highly actionable API reference skill with executable examples in both curl and TypeScript. Its main weaknesses are moderate verbosity from redundant coverage across curl/SDK/table formats, and missing explicit validation checkpoints in workflows (e.g., checking karma before creating accounts, handling 402 errors in polling loops). The content would benefit from splitting into overview + reference files.

Suggestions

Add explicit karma-check validation steps before account creation and send operations in the workflow examples (e.g., 'Step 1: Check karma balance. If < 10, stop and report insufficient karma.')

Add failure/timeout handling to the polling loops in common patterns—what should the agent do if no verification email arrives after 60 seconds?

Consider splitting the full API reference table, TypeScript types, and common patterns into separate bundle files to reduce the main SKILL.md size and improve progressive disclosure

DimensionReasoningScore

Conciseness

The skill is fairly comprehensive but includes some redundancy—the full API reference table largely duplicates the quick start examples, and the TypeScript SDK section repeats the same operations shown in curl. The types section and some explanatory text could be trimmed. However, it avoids explaining basic concepts Claude already knows.

2 / 3

Actionability

Excellent actionability with fully executable curl commands, complete TypeScript SDK examples, webhook verification code, and common patterns like polling for verification emails. All code is copy-paste ready with realistic payloads and response shapes.

3 / 3

Workflow Clarity

The common patterns section shows clear multi-step workflows (signup + poll, send + wait for reply), but there are no explicit validation checkpoints. Notably, the skill mentions checking karma balance before operations but doesn't integrate this as a validation step in the workflows. The polling loops lack timeout/failure handling guidance.

2 / 3

Progressive Disclosure

The content is well-structured with clear section headers and a logical progression from quick start to advanced patterns. However, it's a monolithic document (~200+ lines) with no bundle files; the types, full API reference, and common patterns could be split into separate files for better progressive disclosure. For a skill of this size, inline content is borderline acceptable but would benefit from separation.

2 / 3

Total

9

/

12

Passed

Description

67%

Based on the skill's description, can an agent find and select it at the right time? Clear, specific descriptions lead to better discovery.

The description is strong in specificity and distinctiveness, clearly naming the AgentMail API and listing concrete actions like creating accounts, sending/receiving emails, managing webhooks, and checking karma balance. However, it lacks an explicit 'Use when...' clause which caps completeness, and trigger term coverage could be broader to capture more natural user phrasings.

Suggestions

Add an explicit 'Use when...' clause, e.g., 'Use when the user needs to set up email for AI agents, send or receive mail programmatically, or interact with the AgentMail API.'

Include additional natural trigger terms such as 'inbox', 'mail', 'email automation', 'programmatic email', or 'agent email' to improve keyword coverage.

DimensionReasoningScore

Specificity

Lists multiple specific concrete actions: 'Create accounts, send/receive emails, manage webhooks, and check karma balance via the AgentMail API.' These are clear, actionable capabilities.

3 / 3

Completeness

Clearly answers 'what does this do' with specific actions, but lacks an explicit 'Use when...' clause or equivalent trigger guidance. The 'when' is only implied by the capability listing.

2 / 3

Trigger Term Quality

Includes relevant terms like 'email', 'send/receive emails', 'webhooks', 'AgentMail API', and 'accounts', but misses common user variations like 'inbox', 'mail', 'SMTP', or 'email automation'. The term 'karma balance' is domain-specific and may not be naturally used by most users.

2 / 3

Distinctiveness Conflict Risk

The description is clearly scoped to the AgentMail API specifically, with a distinct niche of 'email infrastructure for AI agents.' This is unlikely to conflict with general email or communication skills due to the specific API and agent-focused framing.

3 / 3

Total

10

/

12

Passed

Validation

90%

Checks the skill against the spec for correct structure and formatting. All validation checks must pass before discovery and implementation can be scored.

Validation10 / 11 Passed

Validation for skill structure

CriteriaDescriptionResult

frontmatter_unknown_keys

Unknown frontmatter key(s) found; consider removing or moving to metadata

Warning

Total

10

/

11

Passed

Repository
sickn33/antigravity-awesome-skills
Reviewed

Table of Contents

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