# Rounder tools (npm · @roundertools/mcp)

Local PDF, Office, image, archive and video tools for AI agents. Files never leave your computer.

- Trust score: 70/100 (medium)
- Change this week: +2
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-11-05

## Components

- npm · `@roundertools/mcp`: 70/100 (this document), [markdown](https://verifymcp.io/servers/adam-sari-roundertools/roundertools-mcp.md), [page](https://verifymcp.io/servers/adam-sari-roundertools/roundertools-mcp)

## Channel facts

- Registry: `npm`
- Package: `@roundertools/mcp`
- Version: `0.3.0`
- Transport: `stdio`

## Trust breakdown

How this component scores in each security and reliability category. Every signal is checked automatically from public evidence about the published package, including repeated runs of it in an isolated sandbox, and we only credit what we can confirm. Scores are 0–100 per category. Scoring method: https://verifymcp.io/docs/scoring (what has changed: https://verifymcp.io/docs/scoring/changelog)

Scored 2026-11-05.

- **Supply Chain Security**: 100/100
  - No malware found by supply-chain analysis.
  - No known CVEs affecting this package version or its production dependencies.
  - No install/post-install scripts declared.
  - 1 of 12 dependencies flagged as unhealthy.
- **Provenance & Transparency**: 48/100
  - Source repository is publicly reachable at the declared URL.
  - Provenance check failed: no build-provenance attestation is published.
  - Clear OSI-approved license (MIT).
  - Actively maintained (last published 1 days ago).
  - Publishes a security disclosure policy (SECURITY.md).
- **Schema Quality & AI Usability**: 76/100
  - 100% of prompts and resources have a non-trivial description (not blank, and not just the item's name).
  - AI-judged instruction clarity (good).
  - Context-footprint check failed: tool/resource definitions use about 417 tokens (~139/item across 3 items; 3 tools + 0 resources), over budget; trim descriptions and params.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 0/100
  - Stability check failed: the tool surface changed between 0.1.0 and 0.3.0: 20 tool removals, 0 breaking changes, 0 additions.
- **Tool Coverage**: 84/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 43% of tool parameters carry a description.
  - Structured output schemas are declared (33% of tools); any adoption earns full credit.
- **Tool Safety**: 100/100
  - No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.
  - We read all 3 captured tool definition(s), and no name or description among them implies an irreversible operation.
  - An AI judge read all 4 captured unit(s) of tool text and found none that tries to manipulate the model reading it.
- **Capabilities**: 100/100
  - Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.

## Install

### How do I install the Rounder tools MCP server?

Rounder tools runs locally as an npm package, launched with npx -y @roundertools/mcp. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.

### Claude

```bash
claude mcp add adam-sari-roundertools -- npx -y @roundertools/mcp
```

### Cursor

```json
{
  "mcpServers": {
    "adam-sari-roundertools": {
      "command": "npx",
      "args": [
        "-y",
        "@roundertools/mcp"
      ]
    }
  }
}
```

### VS Code

```json
{
  "servers": {
    "adam-sari-roundertools": {
      "command": "npx",
      "args": [
        "-y",
        "@roundertools/mcp"
      ]
    }
  }
}
```

### Codex

```bash
codex mcp add adam-sari-roundertools -- npx -y @roundertools/mcp
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "adam-sari-roundertools": {
      "type": "local",
      "command": [
        "npx",
        "-y",
        "@roundertools/mcp"
      ],
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add adam-sari-roundertools --command npx --arg -y --arg @roundertools/mcp
```

### Hermes

```yaml
mcp_servers:
  adam-sari-roundertools:
    command: "npx"
    args: ["-y", "@roundertools/mcp"]
```

### Netclaw

```json
{
  "McpServers": {
    "adam-sari-roundertools": {
      "Transport": "stdio",
      "Command": "npx",
      "Arguments": [
        "-y",
        "@roundertools/mcp"
      ]
    }
  }
}
```

### Vellum

```bash
assistant mcp add adam-sari-roundertools -t stdio -c npx -a -y @roundertools/mcp
```

### Other

```json
{
  "mcpServers": {
    "adam-sari-roundertools": {
      "command": "npx",
      "args": [
        "-y",
        "@roundertools/mcp"
      ]
    }
  }
}
```

## Changelog

Every change recorded for this component, newest first. Days that predate change tracking, or that we cannot explain, say so: "we were watching and nothing happened" and "we were not watching" are different claims.

### 2026-11-04 (score 70, +15)

- [security improvement] Malware scan: unverified → pass

### 2026-11-03 (score 55, 0)

- [security improvement] Malware scan: unverified → pass
- [functional] Package version: 0.2.0 → 0.3.0

### 2026-11-02 (score 55, −14)

- [security regression] Malware scan: pass → unverified
- [security regression] Stability: 0.10 → fail
- [functional regression] Tool coverage: 82% → 43%
- [functional regression] Tool coverage: 91% → 33%
- [functional improvement] Schema quality: 182 → 139
- [functional] First check of Schema quality: 100
- [functional] Destructive annotations: 100 → pass
- [functional] Package version: 0.1.0 → 0.2.0

### 2026-11-01 (score 69, +1)

- [functional improvement] Security disclosure: unverified → pass

### 2026-10-31 (score 68, 0)

- [functional regression] Security disclosure: pass → unverified

### 2026-10-29 (score 68)

First indexed and scored.

## MCP tools (3)

### `find-tool` (~134 tokens)

Find a tool

Search Rounder's tools by what you want done (e.g. "make a pdf smaller", "heic to jpg"). Returns matching tools, each with the tool to call and example arguments. Covers PDFs (merge, split, compress, protect, unlock, pages, watermark, text, images), images (convert, compress, resize, crop, rotate, EXIF), zip, unzip, file info, and video or audio with ffmpeg (compress, convert, trim, mute, GIF, MP3). Runs locally; files never leave this computer.

Input parameters:

- `limit` (integer)
- `query` (string, required)

### `describe-tool` (~50 tokens)

Describe a tool

The full options (as JSON Schema), inputs and an example for any Rounder tool, listed or not.

Input parameters:

- `tool` (string, required): A tool slug, like compress-pdf or png-to-jpg

### `run-tool` (~102 tokens)

Run any tool

Run any Rounder tool by slug, including ones not listed here (see find-tool and describe-tool). Options are checked against that tool's schema. Runs locally; files never leave this computer.

Input parameters:

- `inputs` (array, required): Absolute paths of the input files
- `options` (object)
- `output` (string): Absolute path of a folder (or a new file) for the results. Default: next to the input
- `tool` (string, required)

Output parameters:

- `data` (object)
- `outputs` (array)
- `text` (string)
- `warnings` (array)
- `web` (string)

## Diagnostics

Captured diagnostic sections: Provenance, Dependencies. The full working is on the page: https://verifymcp.io/servers/adam-sari-roundertools/roundertools-mcp#diagnostics

## Score history

- 2026-11-05: 70
- 2026-11-04: 70
- 2026-11-03: 55
- 2026-11-02: 55
- 2026-11-01: 69
- 2026-10-31: 68
- 2026-10-30: 68
- 2026-10-29: 68

## Common questions

### What is the Rounder tools MCP server?

Rounder tools is an MCP server listed in the public MCP registry as io.github.adam-sari/roundertools. Local PDF, Office, image, archive and video tools for AI agents. Files never leave your computer. This page covers its npm package (@roundertools/mcp).

### Is the Rounder tools MCP server safe to use?

Rounder tools scores 70 out of 100 on VerifyMCP. We found no known CVEs affecting it as of 5 November 2026. It declares no install or post-install scripts. That is a record of what we were able to check automatically, not an endorsement. The category breakdown on this page shows every signal behind the number, including the ones we could not confirm.

### What tools does the Rounder tools MCP server expose?

Rounder tools exposes 3 tools: find-tool, describe-tool, run-tool. Their descriptions and schemas cost roughly 286 tokens of context every time the server is loaded.

### Is the Rounder tools MCP server still maintained?

Rounder tools is still listed as active in the MCP registry. We last reached this channel on 5 November 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.

### What licence is the Rounder tools MCP server under?

Rounder tools declares the MIT licence, which is OSI-approved. That covers the source only, and says nothing about the cost of any service it calls.

## Links

- npm package: https://www.npmjs.com/package/@roundertools/mcp
- Socket report: https://socket.dev/npm/package/@roundertools/mcp
- Repository: https://github.com/adam-sari/rounder
- Website: https://roundertools.com/developers/mcp
- Changelog RSS feed: https://verifymcp.io/servers/adam-sari-roundertools/roundertools-mcp.xml
- Changelog JSON feed: https://verifymcp.io/servers/adam-sari-roundertools/roundertools-mcp.json
- HTML version of this page: https://verifymcp.io/servers/adam-sari-roundertools/roundertools-mcp