Grades are a hygiene check, not a security guarantee.

MCP, MCP server

Study Design Diagram Studio WebMCP

A browser workspace by Black Swan Causal Labs for creating, reviewing, and exporting epidemiologic study design diagrams.

Compatibility: Not stated.

Grade B

Minor issues only, no Medium or High. Worth a quick look at the findings below before installing.

Graded by PlugVetRubric v2

Not a guarantee. A hygiene check of the source at the commit shown, not a security audit.

Rescanned at commit 16b760cb4d7f, unchanged since the check below.

NETWORK_NO_FIXED_HOST SECRETS_PATH_DOTENV OBFUSCATION_FILE_OVER_READ_CAP

Why this grade

  • NETWORK_NO_FIXED_HOST Low

    Makes a network call whose host is not written as a fixed address.

    lib/study/export.ts, line 14 +'.pptx'});return;}const response=await fetch('/DejaVuSans.ttf');if(!response.ok)throw

  • SECRETS_PATH_DOTENV Low

    Mentions a .env file.

    README.md, line 79 Deployment is currently manual through Wrangler. Pushing to this GitHub repository does not automatically deploy to Cloudflare. Never commit Cloudflare tokens, `.env` files, `.dev.

  • OBFUSCATION_FILE_OVER_READ_CAP Note

    A file was over the read cap and was not fully read.

    THIRD_PARTY_NOTICES.txt, line 1 Third-party notices for Study Design Diagram Studio

Any High, or two or more Medium findings, give D. One Medium gives C. Low findings or a security Note give B. Each code names a finding behind the letter.

Grades are a hygiene check of the source at the commit shown, on the date checked, not a security audit or a guarantee. The free directory grades are automated. Before release, a PlugVet engineer reviews every paid report and any grade we hold back, including all F grades, against the source code and the evidence we quote.

What was checked

Plain notes from the hygiene checks.

  • Permissions

    Pass

    No shell or command execution found, and no extra permission was declared.

  • Install and update

    Pass

    No install-time script found, and dependencies are pinned or absent.

  • Network

    Concern

    can reach a host that is not written as a fixed address.

    NETWORK_NO_FIXED_HOST

    lib/study/export.ts, line 14

    +'.pptx'});return;}const response=await fetch('/DejaVuSans.ttf');if(!response.ok)throw

    mcp-bridge/browser.js, line 58

    try { await fetch(endpoint + '/disconnect', { method: 'POST', headers: { Authorization: `Bearer ${session.id}.${session.hostToken}` }, keepalive: true }); }

    mcp-bridge/browser.js, line 85

    const response = await fetch(endpoint + '/sessions', { method: 'POST', signal: AbortSignal.timeout(15_000) });

    Show more

    mcp-bridge/browser.js, line 91

    const ws = new WebSocket(wsUrl, ['canvas-bridge', 'auth.' + session.hostToken]);

    mcp-bridge/src/worker.ts, line 67

    async fetch(request: Request): Promise<Response> {

    mcp-bridge/src/worker.ts, line 166

    async fetch(request: Request, env: Env): Promise<Response> {

    mcp-bridge/src/worker.ts, line 207

    return cors(await env.SESSIONS.getByName(id).fetch(request));

  • Secrets

    Concern

    reads a credential or environment file.

    SECRETS_PATH_DOTENV

    .gitignore, line 3

    .wrangler/

    README.md, line 79

    Deployment is currently manual through Wrangler. Pushing to this GitHub repository does not automatically deploy to Cloudflare. Never commit Cloudflare tokens, `.env` files, `.dev.

  • Agent instructions

    Pass

    No instruction to ignore earlier instructions or to hide a step.

  • Obfuscation

    Note

    a file was over the read cap and was not fully read.

    OBFUSCATION_FILE_OVER_READ_CAP

    THIRD_PARTY_NOTICES.txt, line 1

    Third-party notices for Study Design Diagram Studio

    package-lock.json, line 1

    {

    public/THIRD_PARTY_NOTICES.txt, line 1

    Third-party notices for Study Design Diagram Studio

  • Licence

    Pass

    A licence file is present (LICENSE).

  • Maintainer activity

    Pass

    The latest commit is within the last 365 days.

Get the full report on this tool, £49

Note

Hygiene check of commit 16b760cb4d7f. can reach a host that is not written as a fixed address. reads a credential or environment file. a file was over the read cap and was not fully read.

Date and source

Date checked:

View source

github.com

Commit graded: 16b760cb4d7f96f47800a594963e448f08a4e0a1

This link goes to the original host. PlugVet does not host or check what you download from there, and installing it is your own decision and risk.

Read how this letter is chosen