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LokiMCPUniverse

Rancher MCP Server

create_kubeconfig

Generate a kubeconfig to connect to a Kubernetes cluster managed by Rancher, using the cluster's identifier.

Instructions

Generate a kubeconfig document for the given cluster.

Args: cluster_id: Rancher-assigned cluster identifier.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
cluster_idYes

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault
resultYes
Behavior2/5

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

With no annotations provided, the description carries full burden. It only states it generates a kubeconfig document but does not disclose any behavioral traits such as side effects, permissions needed, or whether it is read-only or destructive.

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 extremely concise: two sentences with clear front-loading. The first sentence states the purpose, and the second lists the argument. No wasted words.

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

Completeness3/5

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

Given the simplicity of the tool (one parameter) and that an output schema exists, the description covers the core function. However, it lacks any mention of prerequisites, error conditions, or behavior beyond generation, leaving some gaps for a real-world scenario.

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?

Schema coverage is 0% (no descriptions in schema properties), so the tool description must compensate. It adds meaning by noting that 'cluster_id' is a 'Rancher-assigned cluster identifier', which goes beyond the schema's type-only definition. For a single parameter, this is sufficient additional context.

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 states 'Generate a kubeconfig document for the given cluster', which is a specific verb and resource. It clearly distinguishes from sibling tools like 'get_cluster' or 'list_clusters', which do not generate kubeconfig documents.

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?

No guidance on when to use this tool versus alternatives. It does not mention prerequisites, when not to use, or any context for selection among sibling tools.

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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