random-number

Generate a random integer between min and max (inclusive). Use when the user asks for a random number.

Quality

87%

Does it follow best practices?

Run evals on this skill

Adds up to 20 points to the overall score

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Securityby

Passed

No findings from the security scan

Quality

Content

100%

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

The body is a model of lean, executable guidance for a simple skill: one concrete command, no padding, and clear expectations of output. Nothing material is missing for a single-purpose skill of this size.

Dimension	Reasoning	Score
Conciseness	Two lean sentences plus one executable command; no padding and no explanation of concepts Claude already knows, so every token earns its place.	3 / 3
Actionability	Provides a fully executable, copy-paste-ready command with a hardcoded script path and explicit positional arguments (<min> <max>).	3 / 3
Workflow Clarity	A simple single-task skill where the single action is unambiguous; no multi-step or destructive operation requires validation checkpoints.	3 / 3
Progressive Disclosure	Under 50 lines with no need for external references, and the body is well-organized and self-contained, satisfying the simple-skill exception for progressive disclosure.	3 / 3
	Total	12 / 12 Passed

Description

75%

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 clear, concise, and third-person with an explicit trigger, covering both what and when. It is slightly limited by a single named action and narrow trigger-term coverage.

Dimension	Reasoning	Score
Specificity	Names a concrete action ("Generate a random integer between min and max (inclusive)") with explicit parameters, but only describes a single action rather than multiple specific concrete actions like the score-3 anchor.	2 / 3
Completeness	Explicitly answers both what ("Generate a random integer between min and max (inclusive)") and when ("Use when the user asks for a random number.") with an explicit 'Use when' trigger clause.	3 / 3
Trigger Term Quality	Includes natural terms ("random number", "random integer") a user would say, but coverage is narrow and misses common variations like "random number generator", "pick a number", or "dice roll".	2 / 3
Distinctiveness Conflict Risk	Targets a clear niche (random integer generation) with a distinct trigger unlikely to overlap with other skills.	3 / 3
	Total	10 / 12 Passed

Validation

100%

Warnings & errors only

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

Validation — 16 / 16 Passed

Validation for skill structure

No warnings or errors.

Repository: rivet-dev/sandbox-agent
Path: examples/skills-custom-tool/SKILL.md
Commit: bbc195c

Reviewed: about 16 hours ago

Table of Contents

Discovery Implementation Validation

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