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mcp-kubevela

by zhouweico

vela_dry_run_application

Idempotent

Preview and render Kubernetes resource YAML configurations for an application without actually deploying them, enabling safe validation before deployment.

Instructions

部署预演:渲染出将要下发的 K8s 资源 YAML,但不实际部署(安全)。

对应 API:POST /api/v1/applications/{app}/dry-run

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
paramsYes

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault
resultYes
Behavior4/5

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

The description confirms safety and specifies output (YAML), adding value beyond annotations (idempotentHint, destructiveHint). No contradictions with annotations.

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 two concise sentences, front-loaded with purpose, and includes the API endpoint. No unnecessary words.

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

Completeness4/5

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

Given the existence of an output schema and annotations, the description covers purpose and effect adequately. It could mention when to use or elaborate on output, but overall sufficient.

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?

The tool description adds no parameter-specific information, but the input schema provides detailed descriptions for each sub-field within the params object. Baseline 3 applies due to sufficient schema documentation.

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 verb (dry-run), resource (application), and outcome (renders K8s YAML without deployment). It implicitly distinguishes from deployment tools by noting it does not actually deploy.

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 guidance on when to use this tool vs alternatives like vela_deploy_application. No prerequisites or conditions are mentioned.

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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