Kubernetes MCP Server

Instructions

Implementation Reference

• server.js:2060-2068 (handler)

  Handler function for the 'label' tool that destructures arguments, constructs a 'kubectl label' command, executes it via execAsync, and returns the stdout or a success message.

  case "label": {
    const { resource, name, labels, namespace } = args;
    const nsArg = namespace ? `-n ${namespace}` : "";
    const cmd = `kubectl label ${resource} ${name} ${labels} ${nsArg}`;
    const { stdout } = await execAsync(cmd);
    return {
      content: [{ type: "text", text: stdout || `Labels updated on ${resource} ${name}` }]
    };
  }

• server.js:1041-1065 (schema)

  Tool schema definition for 'label', including name, description, and inputSchema with properties for resource, name, labels (required), and optional namespace.

    name: "label",
    description: "Add or update labels on a resource",
    inputSchema: {
      type: "object",
      properties: {
        resource: { 
          type: "string",
          description: "The resource type"
        },
        name: { 
          type: "string",
          description: "The name of the resource"
        },
        labels: { 
          type: "string",
          description: "Labels to add/update (key=value,key2=value2)"
        },
        namespace: { 
          type: "string",
          description: "The namespace of the resource (optional, defaults to current context namespace)"
        }
      },
      required: ["resource", "name", "labels"]
    }
  },

• server.js:1391-1394 (registration)

  Registration of the tool list handler that returns the array of all tools (including 'label') in response to ListToolsRequestSchema.

  // Handle tool listing
  server.setRequestHandler(ListToolsRequestSchema, async () => {
    return { tools };
  });