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razvanmacovei

Multi Cluster Kubernetes MCP Server

k8s_get_roles

List RBAC Roles with their permission rules, optionally scoped to a specific namespace or across all namespaces.

Instructions

List RBAC Roles with their permission rules. Roles grant permissions within a specific namespace. Omit namespace to list roles across all namespaces.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
contextYes
namespaceNo
Behavior2/5

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

No annotations provided. Description implies a read-only operation but does not disclose potential behavioral traits such as pagination, rate limits, or required permissions. Minimal transparency beyond basic purpose.

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?

Three sentences with no wasted words: action, role scope, and namespace usage. Front-loaded with the primary purpose. Efficient and clear.

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?

Simple tool for listing roles; description covers key purpose and namespace filtering. No output schema needed, but could mention return format or permission rules structure. Adequate for its simplicity.

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

Parameters2/5

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

Schema description coverage is 0%. Description adds meaning to the namespace parameter (omit to list across namespaces) but completely fails to explain the required context parameter, leaving critical input undocumented.

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 'List' and the resource 'RBAC Roles', specifying that it lists roles with their permission rules. It distinguishes from sibling tools like k8s_get_clusterroles by mentioning namespace scope.

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

Usage Guidelines3/5

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

Provides guidance on namespace parameter omission to list across namespaces, but lacks explicit comparison to alternative tools like k8s_get_clusterroles or k8s_get_rolebindings. No 'when not to use' advice.

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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