File Size Formatter Skill

Overview

File Size Formatter works by dividing byte values by the appropriate divisor (1024 for binary, 1000 for decimal) to calculate sizes in various units. Automatically selects the most appropriate unit or allows manual specification.

Live Test File Size Formatter Skill Skill →

The tool

Once your client is connected to the VerveKit server, this appears in its tool list as FileSizeFormatterSkill. It is read-only and open-world — it fetches and never mutates anything on your side — so most clients call it without asking you to confirm.

{
  "name": "FileSizeFormatterSkill",
  "arguments": {
    "bytes": "1073741824"
  }
}

You do not name the tool yourself; the model picks it. Asking about 1073741824 in the terms this skill covers is enough for it to reach for FileSizeFormatterSkill on its own — naming it explicitly also works, and is the way to force the call.

Connecting

One server URL covers every skill in the catalog, including this one. Authorization is OAuth: the client opens a browser once, and there is no key to paste into a config file.

{
  "mcpServers": {
    "vervekit": {
      "url": "https://api.vervekit.com/v1/mcp"
    }
  }
}

https://api.vervekit.com/v1/mcp

Per-client setup — Claude, Cursor, VS Code, ChatGPT — is on the MCP setup page.

Arguments

These are the properties on the tool's inputSchema, so a well-behaved client validates them before the call is made. Premium arguments are accepted on every plan but only take effect on plans that include them.

What the model gets back

The result carries a structuredContent object matching the tool's declared outputSchema, so a client reads fields without parsing prose. status is "ok" and error is null on success; a null field means the value was not available for that input, not that the call failed.

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{
  "status": "ok",
  "error": null,
  "data": {
    "bytes": 1073741824,
    "formatted": "1 GiB",
    "value": 1,
    "unit": "GiB",
    "standard": "binary",
    "precision": 2,
    "conversions": {
      "B": 1073741824,
      "KiB": 1048576,
      "MiB": 1024,
      "GiB": 1,
      "TiB": 0,
      "PiB": 0,
      "EiB": 0,
      "ZiB": 0,
      "YiB": 0
    }
  }
}

Response fields

Paths are relative to data. Premium fields are absent rather than zeroed on plans that do not include them, so check for presence instead of comparing to 0.

Failure modes

Errors come back as tool errors carrying a sentence the model can act on, not a bare status code. Error handling covers the full list.

A call costs 2 credits each time the tool actually runs; a model that reasons about the tool without calling it costs nothing.

Use cases

File Management

Display file sizes in user-friendly formats in file managers and storage applications

Storage Analytics

Format storage usage data in dashboards and analytics reports

Data Transfer

Show download and upload sizes in appropriate units during file transfers

API Responses

Convert byte sizes to readable formats in API responses and data exports

Other ways to use File Size Formatter Skill

Set up File Size Formatter Skill on VerveKit, or reach the same source a different way. Your VerveKit account and credits work on all of them — one key, one balance.

Related

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