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rancher-mcp-server

rancher-mcp-server

by flaviagaia
OverviewSchemaSourceRelated ServersDiscussionsAdmin
Python
Remote

list_nodes

Retrieve all nodes in a Rancher cluster, showing their roles, current state, and requested resources.

Instructions

List the nodes of a cluster with roles, state and requested resources.

Tool call template

Replace each placeholder with a value matching the input schema. Only required parameters are included; add optional parameters as needed.

{
  "id": 1,
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "arguments": {
      "cluster_id": "<cluster_id>"
    },
    "name": "list_nodes"
  }
}

Input Schema

NameRequiredDescriptionDefault
cluster_idYes

Output Schema

NameRequiredDescriptionDefault
resultYes

Schema Changelog

Changes observed during successful MCP inspections.

  1. First observedv0.1.0

TDQS

A3.5/5.0
Behavior3/5

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

With no annotations, the description carries the full burden of behavioral disclosure. It describes the output fields but does not mention any side effects, error conditions, pagination, or the implicit read-only nature of the operation, leaving gaps in the agent's understanding.

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 of 14 words, directly conveying the essential information without extraneous content. It is optimally structured for quick parsing.

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?

The description covers the basic purpose and return fields, and an output schema exists. However, it omits context such as that it lists all nodes in the specified cluster, and lacks any error or edge case handling cues, making it adequate but not thorough.

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?

The only parameter, cluster_id, is described in the schema only with a title 'Cluster Id'. The description reiterates 'a cluster' but adds no concrete meaning about format, valid values, or examples, failing to compensate for the low schema coverage.

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 action (list), resource (nodes of a cluster), and the details returned (roles, state, requested resources). It distinguishes from sibling tools like list_clusters and list_pods by focusing on nodes within a specific cluster.

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 versus alternatives, nor does it mention prerequisites or context such as necessary permissions or cluster availability. This leaves the agent uncertain about appropriate invocation scenarios.

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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