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list_ops

Display all server operators from the ops.json file to manage administrator permissions in Minecraft Java Edition servers.

Instructions

List all server operators from ops.json.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault

No arguments

Implementation Reference

  • The handler for the "list_ops" tool, which reads and parses ops.json to return a formatted list of server operators.
    server.tool(
      "list_ops",
      "List all server operators from ops.json.",
      {},
      async () => {
        const opsPath = path.join(manager.getServerDir(), "ops.json");
        if (!fs.existsSync(opsPath)) {
          return {
            content: [{ type: "text", text: "ops.json not found." }],
          };
        }
        const ops = JSON.parse(fs.readFileSync(opsPath, "utf-8"));
        if (!Array.isArray(ops) || ops.length === 0) {
          return { content: [{ type: "text", text: "No operators configured." }] };
        }
        const lines = ops.map(
          (op: { name: string; uuid: string; level: number }) =>
            `${op.name} (UUID: ${op.uuid}, Level: ${op.level})`
        );
        return { content: [{ type: "text", text: lines.join("\n") }] };
      }
    );
Behavior3/5

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

No annotations provided, so description carries full burden. It discloses the data source ('ops.json') which implies file-system read behavior, but lacks details on error handling (missing file), return format, or required permissions.

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?

Single sentence, seven words, front-loaded with action verb. Every word serves a purpose; no extraneous content.

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 no output schema exists and this is a read operation with zero parameters, the description adequately identifies the data source but fails to describe the return value structure (e.g., array of objects with usernames/levels) which would help the agent consume the result.

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?

Zero parameters present per schema, which per guidelines warrants a baseline score of 4. The description does not need to compensate for missing schema documentation.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose4/5

Does the description clearly state what the tool does and how it differs from similar tools?

Clear verb 'List' and specific resource 'server operators from ops.json'. The mention of 'ops.json' implicitly distinguishes from sibling 'list_players', though it does not explicitly contrast with alternatives.

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 versus alternatives like 'list_players', or prerequisites for viewing operators. Description states what it does but not when to prefer it over siblings.

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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