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mmpyro

vcluster-mcp

by mmpyro

vcluster_pause

Pause a running virtual cluster to stop its workloads while preserving state for later resumption.

Instructions

Pause a running vcluster, stopping its workloads without deleting state.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
nameYes
namespaceNo
kubeconfig_pathNo

Schema Changelog

Changes observed during successful MCP inspections.

  1. Changed1 schema field changedv2.0.0
    • changedOutput schema / (root)
      Previous value: -{
      -  "$defs": {
      -    "CommandResult": {
      -      "properties": {
      -        "exit_code": {
      -          "title": "Exit Code",
      -          "type": "integer"
      -        },
      -        "output": {
      -          "title": "Output",
      -          "type": "string"
      -        }
      -      },
      -      "required": [
      -        "exit_code",
      -        "output"
      -      ],
      -      "title": "CommandResult",
      -      "type": "object"
      -    }
      -  },
      -  "properties": {
      -    "result": {
      -      "anyOf": [
      -        {
      -          "$ref": "#/$defs/CommandResult"
      -        },
      -        {
      -          "additionalProperties": {
      -            "type": "string"
      -          },
      -          "type": "object"
      -        },
      -        {
      -          "type": "string"
      -        }
      -      ],
      -      "title": "Result"
      -    }
      -  },
      -  "required": [
      -    "result"
      -  ],
      -  "title": "vcluster_pauseOutput",
      -  "type": "object"
      -}New value: +null
  2. First observedv0.1.0

TDQS

A3.8/5.0
Behavior4/5

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

With no annotations provided, the description carries the full transparency burden and does add meaningful behavioral context: it stops workloads and preserves state. It is honest about the non-destructive nature, though it could mention reversibility or prerequisites more explicitly.

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, tightly packed sentence with no filler. The key action and scope are front-loaded, making it easy to scan and quickly understand.

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?

For a simple three-parameter tool, the description captures the core behavior but misses parameter semantics and explicit guidance on when to use it versus resume or delete. Without annotations or an output schema, a bit more context would improve completeness.

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%, and the description does not explain any of the three parameters. The required 'name' is partially inferable from the tool purpose, but namespace and kubeconfig_path semantics are left completely 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 action ('Pause a running vcluster'), the target resource, and the key behavioral outcome ('stopping its workloads without deleting state'). It distinguishes this tool from siblings like vcluster_delete and vcluster_resume by emphasizing state preservation.

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 implies the tool is for temporarily suspending a vcluster while retaining state, but it does not explicitly say when to choose pause over resume or delete, nor does it mention any exclusions or alternative routing. Usage context is present but left largely to inference.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.