Grades are a hygiene check, not a security guarantee.

MCP, MCP server

io.github.EDKarlsson/locus

io.github.EDKarlsson/locus, an MCP server listed in the PlugVet directory.

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 3b480d6db810, unchanged since the check below.

PERMISSION_DELETE_FILES NETWORK_NAMED_HOST SECRETS_ENV_READ OBFUSCATION_FILE_OVER_READ_CAP

Why this grade

  • PERMISSION_DELETE_FILES Low

    Contains a call that can delete files.

    locus/conform/fix.py, line 74 result = subprocess.run(

  • NETWORK_NAMED_HOST Note

    Calls a fixed host that the description names.

    skills/claude/locus-release/SKILL.md, line 129 curl -s https://pypi.org/pypi/locus-mcp/json | python3 -c "

  • SECRETS_ENV_READ Note

    Reads an environment variable whose name contains KEY, SECRET, TOKEN, PASSWORD or CREDENTIAL.

    locus/mcp/main.py, line 158 api_key = os.environ.get("LOCUS_API_KEY")

  • OBFUSCATION_FILE_OVER_READ_CAP Note

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

    uv.lock, line 1 version = 1

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

    locus/conform/fix.py, line 74

    result = subprocess.run(

    locus/mcp/server.py, line 257

    result = subprocess.run(

    scripts/bench-mcp.py, line 347

    shutil.rmtree(scratch)

    Show more

    scripts/try-mcp.py, line 98

    shutil.rmtree(scratch)

    docs/audits/2026-03-03-security-pr-review-report.md, line 81

    - `subprocess.run([...])` executes `"rg"` via PATH lookup (`:194`), not absolute path.

  • Install and update

    Pass

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

  • Network

    Note

    can reach pypi.org.

    NETWORK_NAMED_HOST

    skills/claude/locus-release/SKILL.md, line 129

    curl -s https://pypi.org/pypi/locus-mcp/json | python3 -c "

  • Secrets

    Note

    reads an environment variable.

    SECRETS_ENV_READ

    locus/mcp/main.py, line 158

    api_key = os.environ.get("LOCUS_API_KEY")

  • 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

    uv.lock, line 1

    version = 1

  • 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 3b480d6db810. can delete files. can reach pypi.org. reads an environment variable. a file was over the read cap and was not fully read.

Date and source

Date checked:

View source

github.com

Commit graded: 3b480d6db810a52141b8a8ac4151f23347cda96f

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