Skills/PyPI/nanobanana-imagen-mcp

nanobanana-imagen-mcp@1.2.0

CAUTION· not started

Publisher claims: "MCP server for AI image generation using NanoBanana Pro 2 -- 4K resolution" Observed in sandbox: no network, touches nothing outside the project, writes no memory.

Registry PyPI (MCP server)Publisher u2n4 · publishing for 210 daysInstalls 170Last detonated 39 h ago
What would fix thisWatchDispute verdict

Coverage

Not started: dependency install failed; the server itself was not observed.
Tested
the dependency install step · every file read, file written and host contacted by what ran
Not tested
server startup · the tool list · tool behavior

What this means for the label: Caution here covers what ran. The server's tools were not exercised with a real credential, so nothing about their behavior is asserted; the credential summary below says what to do with that.

Before you give it your token

It will ask for
GEMINI_API_KEYGOOGLE_API_KEYNANOBANANA_AUTH_METHODConfiguration, not credentials: FASTMCP_HOST, FASTMCP_MASK_ERRORS, FASTMCP_PORT, FASTMCP_TRANSPORT, GCP_PROJECT_ID, GCP_REGION, GOOGLE_CLOUD_LOCATION, GOOGLE_CLOUD_PROJECT, IMAGE_OUTPUT_DIR, LOG_FORMAT, NANOBANANA_DB_PATH, NANOBANANA_MODEL, RETURN_FULL_IMAGE
Where it talks to
no vendor host named in the codeAlso google.dev — not the publisher's domain; check what for before connecting.
What the honeypot saw
no credential files read · no network
What we could not test
server startup · the tool list · tool behavior

Connect it with a scoped credential, under the guard, and read the third-party hosts first. The code names google.dev as well as its own vendor. The guard injects GEMINI_API_KEY, GOOGLE_API_KEY, NANOBANANA_AUTH_METHOD only into requests to the host you bind (and its subdomains) and refuses the rest.

$vet-skills run --net declared -- uvx nanobanana-imagen-mcp

Never paste a credential into a chat, a ticket or a report, including ours. How the guard holds it.

Is [email protected] safe to install?

KillerSkills ran it in the KillerSkills honeypot sandbox (2 scenarios; not started: dependency install failed; the server itself was not observed) on 2026-11-13 and scored it 79/100 (Caution). It is not known to be malicious, but it has behaviour or code a security policy should decide on before install. Notable findings: Access to sensitive file paths; Access to sensitive file paths; Hidden zero-width characters detected. Summary: no network, touches nothing outside the project, writes no memory.

Behavior trace

Honeypot run · 0 s · 2 scenarios · 0 deviations
t+CategoryObserved action
0.0sprocessno install scripts in bundle
0.1sprocessdependency install exit 1 ·
0.1sclaimednot started: dependency install failed (exit 1); the server itself was not observed
0.1sprocessscript backend runs setup only
0.1sprocessno install scripts to re-run

Static findings

MEDIUM
Python subprocess execution detectedtests/test_cli_smoke.py:82 · Python subprocess execution detectedresult = subprocess.run(Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.
AST05
MEDIUM
Python subprocess execution detectedtests/test_cli_smoke.py:57 · Python subprocess execution detectedresult = subprocess.run(Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.
AST05
MEDIUM
File type combined with upload actiontests/test_cli_smoke.py:181 · File type combined with upload action — agent may exfiltrate local data files"""AC4(b): NANOBANANA_DB_PATH unset → default to ~/nanobanana-images/images.db (NOT ./output/)."""Fix: Remove the call, or declare the host in frontmatter and explain in the README what is sent and why.
AST07
MEDIUM
References a credential file in the home directorytests/test_fleet_regressions.py:53 · References a credential file in the home directory"~/.ssh/key.png", "~/.aws/credentials", "~/.config/gcloud/key.png", "x\x00.png"])Fix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST03
MEDIUM
Python subprocess execution detectedtests/test_cli_smoke.py:145 · Python subprocess execution detectedresult = subprocess.run(Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.
AST05
MEDIUM
Access to sensitive file pathstests/test_fleet_regressions.py:52 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system files"/etc/passwd", "//etc/passwd", r"C:\Windows\image.png", r"\\?\C:\Windows\image.png",Fix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST05
HIGH
Access to sensitive file pathsnanobanana_mcp_server/utils/path_utils.py:15 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system files".git-credentials", ".env", ".codex", ".claude", ".grok", ".gemini",Fix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST05
HIGH
Access to sensitive file pathsnanobanana_mcp_server/utils/path_utils.py:14 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system files".ssh", ".aws", ".gnupg", ".gcp", ".docker", ".kube", ".netrc",Fix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST05
MEDIUM
Access to sensitive file pathstests/test_fleet_regressions.py:53 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system files"~/.ssh/key.png", "~/.aws/credentials", "~/.config/gcloud/key.png", "x\x00.png"])Fix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST05
HIGH
Hidden zero-width characters detectednanobanana_mcp_server/tools/generate_image.py:434 · Hidden zero-width characters detected — may conceal contentextra_info += f" • 👨‍👩‍👧 Parent: {meta.get('parent_file_id')}"Fix: Keep SKILL.md to visible, descriptive text. Remove comments and encoded text that address the agent.
AST07
MEDIUM
Python subprocess execution detectedtests/test_cli_smoke.py:115 · Python subprocess execution detectedresult = subprocess.run(Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.
AST05

Cost to the agent

Instructions loaded
≈59 tok
1 file · 55 in bundle
Tool list per prompt
≈0 tok
0 tools · 0 per tool
Handshake
no reply
launch to tools/list, stdio
Undocumented tools
0
description under 20 chars · avg 0

Tokens estimated at four characters each. The tool list is re-read by the agent on every turn, so it is the number to compare between servers that do the same job: ranked across the index.

Known vulnerabilities

No advisories in OSV for nanobanana-imagen-mcp@1.2.0 as of 39 h ago. This is the package itself, not its dependencies.

What would make this Verified

1 point to 80 · weights: behavior 45%, static 25%, prompt 15%, publisher 15%
  1. Unclaimed publisher≈ +8 on the totalClaim u2n4: a verified publisher gets +50 on publisher trust. It is free and usually instant with GitHub sign-in.
  2. Hidden zero-width characters detected≈ +4 on the totalKeep SKILL.md to visible, descriptive text. Remove comments and encoded text that address the agent.
  3. Python subprocess execution detected≈ +2 on the totalBuild commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.
  4. File type combined with upload action≈ +2 on the totalRemove the call, or declare the host in frontmatter and explain in the README what is sent and why.
  5. References a credential file in the home directory≈ +2 on the totalStop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
  6. Access to sensitive file paths≈ +2 on the totalStop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
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