Grades are a hygiene check, not a security guarantee.

MCP, MCP server

ai.smithery/sebastianall1977-gmail-mcp

Manage Gmail end-to-end: search, read, send, draft, label, and organize threads.

Compatibility: Not stated.

Grade C

One Medium finding. Read the findings 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 66b06b969b1e, unchanged since the check below.

SECRETS_PATH_CREDENTIAL

Why this grade

  • SECRETS_PATH_CREDENTIAL Medium

    Mentions a credential store path (~/.ssh, id_rsa, .npmrc, .aws/credentials, credentials.json, .netrc).

    src/config.ts, line 6 export const GMAIL_CREDENTIALS_PATH = path.join(MCP_CONFIG_DIR, 'credentials.json')

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 oauth2.googleapis.com. The description does not name that host.

    NETWORK_UNNAMED_HOST

    src/src/auth.ts, line 36

    const tokenRes = await fetch("https://oauth2.googleapis.com/token", {

  • Secrets

    Concern

    reads a credential or environment file.

    SECRETS_ENV_READ SECRETS_PATH_CREDENTIAL

    src/config.ts, line 6

    export const GMAIL_CREDENTIALS_PATH = path.join(MCP_CONFIG_DIR, 'credentials.json')

    src/config.ts, line 12

    export const CLIENT_SECRET = process.env.CLIENT_SECRET || ''

    src/config.ts, line 13

    export const REFRESH_TOKEN = process.env.REFRESH_TOKEN || ''

    Show more

    src/index.ts, line 27

    const clientSecret = process.env.GOOGLE_CLIENT_SECRET!

    src/src/auth.ts, line 33

    const clientSecret = process.env.GOOGLE_CLIENT_SECRET!;

    README.md, line 49

    4. (Optional) For remote server installation, note the file path mentioned in the success message (`~/.gmail-mcp/credentials.json` by default). The user's `REFRESH_TOKEN` will be f

    README.md, line 118

    | `GMAIL_CREDENTIALS_PATH` | Path to the user credentials file | No | `MCP_CONFIG_DIR/credentials.json` |

  • 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

    pnpm-lock.yaml, line 1

    lockfileVersion: '9.0'

  • Licence

    Pass

    A licence file is present (LICENSE).

  • Maintainer activity

    Note

    the latest commit is more than 365 days old.

    MAINTAINER_STALE

    No file path was stored.

    2025-10-02T23:03:17+02:00

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Note

Hygiene check of commit 66b06b969b1e. can reach oauth2.googleapis.com. The description does not name that host. reads a credential or environment file. a file was over the read cap and was not fully read. the latest commit is more than 365 days old.

Date and source

Date checked:

View source

github.com

Commit graded: 66b06b969b1e3a529c85f200d79ec7a86a110abd

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Read how this letter is chosen