Grades are a hygiene check, not a security guarantee.

MCP, MCP server

Prefect Mcp Server

Prefect workflow orchestration - hosted MCP tools for diagnostics, documentation, and release notes

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.

NETWORK_NO_FIXED_HOST SECRETS_PATH_DOTENV PERMISSION_SHELL_DECLARED INSTALL_DOCUMENTED_INSTALLER SECRETS_ENV_READ 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.

    evals/rate_limits/conftest.py, line 444 response = httpx.get(metadata_url, timeout=1)

  • SECRETS_PATH_DOTENV Low

    Mentions a .env file.

    evals/conftest.py, line 38 load_dotenv(".env.local")

  • PERMISSION_SHELL_DECLARED Note

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

    evals/rate_limits/conftest.py, line 412 process = subprocess.Popen(

  • INSTALL_DOCUMENTED_INSTALLER Note

    Documentation shows an installer that pipes a download into a shell.

    justfile, line 10 echo "• curl -LsSf https://astral.sh/uv/install.sh | sh"

  • SECRETS_ENV_READ Note

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

    packages/ingestion_pipeline/main.py, line 197 api_key = os.getenv("OPENAI_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

    Note

    requests shell access. The manifest names this permission.

    PERMISSION_SHELL_DECLARED

    evals/rate_limits/conftest.py, line 412

    process = subprocess.Popen(

  • Install and update

    Note

    The docs document an installer that pipes a download into a shell.

    INSTALL_DOCUMENTED_INSTALLER

    justfile, line 10

    echo "• curl -LsSf https://astral.sh/uv/install.sh | sh"

    justfile, line 14

    echo "• curl -LsSf https://astral.sh/uv/install.sh | sh"

  • Network

    Concern

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

    NETWORK_NO_FIXED_HOST

    evals/rate_limits/conftest.py, line 444

    response = httpx.get(metadata_url, timeout=1)

  • Secrets

    Concern

    reads a credential or environment file.

    SECRETS_ENV_READ SECRETS_PATH_DOTENV

    evals/conftest.py, line 38

    load_dotenv(".env.local")

    packages/ingestion_pipeline/main.py, line 197

    api_key = os.getenv("OPENAI_API_KEY")

    packages/ingestion_pipeline/main.py, line 321

    api_key = os.getenv("TURBOPUFFER_API_KEY")

    Show more

    src/prefect_mcp_server/cloud_oauth.py, line 41

    env_file=".env",

    src/prefect_mcp_server/settings.py, line 15

    env_prefix="PREFECT_DOCS_MCP_", extra="ignore", env_file=".env"

    src/prefect_mcp_server/settings.py, line 33

    env_prefix="LOGFIRE_", extra="ignore", env_file=".env"

    src/prefect_mcp_server/settings.py, line 88

    env_file=".env",

    src/prefect_mcp_server/settings.py, line 100

    model_config = SettingsConfigDict(env_file=[".env"], extra="ignore")

    .env.example, line 5

    # Set them in your shell or main .env file:

    .gitignore, line 14

    # Environment files

  • 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.

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Note

Hygiene check of commit 48efd289bdb2. requests shell access. The manifest names this permission. The docs document an installer that pipes a download into a shell. 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: 48efd289bdb2b94a78e35b1331fbefc4fa3f6411

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