Grades are a hygiene check, not a security guarantee.

MCP, MCP server

Diagrams Mcp

MCP server for generating cloud architecture diagrams, flowcharts, sequence diagrams, and more — powered by three rendering engines: mingrammer/diagrams, Mermaid, and PlantUML.

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.

PERMISSION_DELETE_FILES NETWORK_NO_FIXED_HOST SECRETS_PATH_UNCONFIRMED

Why this grade

  • PERMISSION_DELETE_FILES Low

    Contains a call that can delete files.

    src/diagrams_mcp/renderer.py, line 138 shutil.rmtree(tmpdir, ignore_errors=True)

  • NETWORK_NO_FIXED_HOST Low

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

    src/diagrams_mcp/renderer.py, line 184 with urllib.request.urlopen(http_request, timeout=self.timeout) as response:

  • SECRETS_PATH_UNCONFIRMED Low

    The Secrets check reports a credential or environment file, but no quoted line shows a recognisable path.

    .dockerignore, line 8 build/

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

    Concern

    can delete files.

    PERMISSION_DELETE_FILES

    src/diagrams_mcp/renderer.py, line 138

    shutil.rmtree(tmpdir, ignore_errors=True)

    src/diagrams_mcp/sandbox.py, line 320

    proc = subprocess.Popen(

    src/diagrams_mcp/sandbox.py, line 334

    shutil.rmtree(tmpdir, ignore_errors=True)

    Show more

    src/diagrams_mcp/sandbox.py, line 343

    shutil.rmtree(tmpdir, ignore_errors=True)

    src/diagrams_mcp/sandbox.py, line 377

    proc = subprocess.Popen(

    src/diagrams_mcp/sandbox.py, line 387

    shutil.rmtree(tmpdir, ignore_errors=True)

    src/diagrams_mcp/sandbox.py, line 395

    shutil.rmtree(tmpdir, ignore_errors=True)

    src/diagrams_mcp/sandbox.py, line 398

    shutil.rmtree(tmpdir, ignore_errors=True)

  • 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

    src/diagrams_mcp/renderer.py, line 184

    with urllib.request.urlopen(http_request, timeout=self.timeout) as response:

  • Secrets

    Concern

    reads a credential or environment file.

    SECRETS_PATH_UNCONFIRMED

    .dockerignore, line 8

    build/

    .gitignore, line 9

    .venv/

  • Agent instructions

    Pass

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

  • Obfuscation

    Pass

    No encoded or minified payload found.

  • Licence

    Note

    no licence file found.

    LICENCE_MISSING

    No file path was stored.

    no licence file found.

  • 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 121aa4bef8af. can delete files. can reach a host that is not written as a fixed address. reads a credential or environment file. no licence file found.

Date and source

Date checked:

View source

github.com

Commit graded: 121aa4bef8af589aae5995d2972bff7e36babcc2

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