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mcp-kubernetes

mcp-kubernetes

by dockndevai
OverviewSchemaSourceRelated ServersDiscussionsAdmin
TypeScript
Hybrid

List kube-config contexts

list_contexts
Read-onlyIdempotent

Lists the Kubernetes clusters configured in your kube-config. Identify available contexts to select the target cluster for management.

Instructions

List the contexts (clusters) available in the loaded kube-config.

Tool call template

This tool declares no required parameters. Add optional parameters from the input schema as needed.

{
  "id": 1,
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "arguments": {},
    "name": "list_contexts"
  }
}

Input Schema

NameRequiredDescriptionDefault

No arguments

Schema Changelog

Changes observed during successful MCP inspections.

  1. First observedv0.1.0

TDQS

A4/5.0
Behavior3/5

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

Annotations already declare readOnlyHint=true, idempotentHint=true, openWorldHint=true, and destructiveHint=false, covering the safety profile. The description adds the useful scoping detail that it reads from the loaded kube-config, but it does not go deeper into behavior such as error cases or connection requirements. This is acceptable for a simple zero-parameter list operation.

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 clear sentence that front-loads the action and resource. It contains no filler or redundancy and is appropriately sized for the tool's simplicity.

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?

For a zero-parameter, read-only listing tool with safety annotations, the description is nearly complete. It clarifies the resource type and source (kube-config). Some extra context about the exact output format could help, but the absence is not a major gap given the straightforward nature of the operation.

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

Parameters4/5

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

The tool has zero parameters, and the schema coverage is 100% (vacuously). The description adds no parameter meaning, but none is needed; per the baseline for zero-parameter tools, this is well handled.

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 uses a specific verb 'List' with the resource 'contexts (clusters)' and clarifies the scope as 'available in the loaded kube-config'. This clearly distinguishes it from sibling list tools like list_namespaces and list_pods, which operate on different resource types.

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?

The description makes the tool's purpose obvious enough that an agent can infer when to use it (when kube-config contexts are needed), but it provides no explicit guidance on when not to use it or how it compares to alternatives. The sibling names imply different resource types, yet no direct routing instruction is given.

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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