Grades are a hygiene check, not a security guarantee.

MCP, MCP server

Holster MCP

Holster MCP exposes local Holster Doctor checks to MCP-compatible agents.

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 bd70dbfc7447, unchanged since the check below.

SECRETS_PATH_DOTENV PERMISSION_SHELL_DECLARED SECRETS_ENV_READ

Why this grade

  • SECRETS_PATH_DOTENV Low

    Mentions a .env file.

    README.md, line 96 "missing_patterns": [".env.local"],

  • PERMISSION_SHELL_DECLARED Note

    Runs shell commands, and the manifest or description says so.

    src/holster_mcp/free/guard.py, line 33 completed = subprocess.run(

  • SECRETS_ENV_READ Note

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

    src/holster_mcp/paid/license.py, line 128 if not os.environ.get("STRIPE_API_KEY"):

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

    Note

    requests shell access. The manifest names this permission.

    PERMISSION_SHELL_DECLARED

    src/holster_mcp/free/guard.py, line 33

    completed = subprocess.run(

    src/holster_mcp/util/cli_shim.py, line 124

    completed = subprocess.run(

    src/holster_mcp/util/doctor_shim.py, line 54

    completed = subprocess.run(

  • Install and update

    Pass

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

  • Network

    Pass

    No network call found.

  • Secrets

    Concern

    reads a credential or environment file.

    SECRETS_ENV_READ SECRETS_PATH_DOTENV

    src/holster_mcp/paid/license.py, line 128

    if not os.environ.get("STRIPE_API_KEY"):

    src/holster_mcp/util/cli_shim.py, line 58

    password = os.environ.get("HOLSTER_VAULT_PASSWORD")

    README.md, line 96

    "missing_patterns": [".env.local"],

    Show more

    src/holster_mcp/util/config.py, line 55

    return explicit or os.environ.get("HOLSTER_LICENSE_KEY") or config_value("license_key") or config_value(

    README.md, line 97

    "existing_safe": [".env"],

    README.md, line 99

    "suggested_append": ".env.local\n*.pem"

  • Agent instructions

    Pass

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

  • Obfuscation

    Pass

    No encoded or minified payload found.

  • 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 bd70dbfc7447. requests shell access. The manifest names this permission. reads a credential or environment file.

Date and source

Date checked:

View source

github.com

Commit graded: bd70dbfc7447952d3e758b745c2165b2d7c1dcad

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