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rshade
by rshade

actionlint

Validate GitHub Actions workflow files for syntax errors, invalid parameters, and best practices.

Instructions

Validate GitHub Actions workflow files for syntax errors, invalid parameters, and best practices

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
argsNoAdditional arguments
colorNoEnable colored output
filesNoSpecific workflow files to lint (supports glob patterns)
formatNoOutput format for validation results
ignoreNoIgnore rules by glob pattern
noColorNoDisable colored output
timeoutNoCommand timeout in milliseconds
verboseNoEnable verbose output
pyflakesNoEnable pyflakes for Python run: blocks (default: false)
directoryNoWorking directory for the command
shellcheckNoEnable shellcheck integration for run: blocks (default: true)
Behavior2/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

With no annotations, the description must fully disclose behavioral traits. It only describes validation scope without addressing read-only nature, required permissions, network usage, or side effects. The integration with pyflakes/shellcheck is not explained.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness5/5

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is a single sentence that is concise and front-loaded with the core purpose. Every word earns its place.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness2/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

Given 11 parameters and no output schema, the description omits important details such as return format, exit codes, and typical usage patterns. It does not mention the format parameter or how results are presented.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters3/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema coverage is 100%, so the baseline is 3. The description does not add extra meaning beyond the schema; it rephrases schema descriptions minimally. No new context for parameters is provided.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose5/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description clearly states the tool validates GitHub Actions workflow files for syntax errors, invalid parameters, and best practices. This is a specific verb-resource combination that distinguishes it from sibling linters targeting other languages.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines2/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

The description provides no explicit guidance on when to use this tool versus alternatives like lint_all or other linters. The context is implied by mentioning 'GitHub Actions workflow files', but there is no 'when to use' or 'when not to use' information.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

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