Nano Banana Prompting Skill
PassAudited by ClawScan on May 1, 2026.
Overview
The skill appears purpose-aligned for Gemini image prompting, but users should notice that it uses a Gemini API key and delegates actual image generation to a local helper script.
This skill looks safe to install if you intend to generate images with Gemini. Before using it, make sure the referenced nano-banana-pro or Gemini generator script is trusted, set your Gemini API key carefully, and avoid sending sensitive reference images unless you are comfortable with the provider handling them.
Findings (4)
Artifact-based informational review of SKILL.md, metadata, install specs, static scan signals, and capability signals. ClawScan does not execute the skill or run runtime probes.
Using the skill may consume Gemini API quota or incur provider-side usage, depending on the user's account.
The skill requires a Gemini API key, which is expected for Gemini image generation but still grants access to the user's provider account or quota.
"requires": { "bins": ["uv"], "env": ["GEMINI_API_KEY"] }, "primaryEnv": "GEMINI_API_KEY"Use a dedicated or least-privileged Gemini API key where possible, monitor usage, and avoid sharing the key in prompts or files.
The separate generator script will determine how prompts, reference images, output paths, and the Gemini API key are handled.
The artifact is instruction-only and delegates actual image generation to another local skill or script, so the safety of that helper matters.
**Requires:** The `nano-banana-pro` skill (bundled with OpenClaw) or any Gemini image generation script.
Install or use only a trusted, reviewed Gemini image-generation helper such as the expected bundled skill.
When asked to generate an image, the agent may run a local helper command and create an output image file.
The skill instructs the agent to run a local Python image-generation helper. This is disclosed and central to the stated image-generation purpose.
uv run {nano-banana-pro-dir}/scripts/generate_image.py --prompt '<YOUR_JSON_PROMPT>' --filename "<descriptive-name>.png" --resolution 2KConfirm the helper script is trusted and keep output filenames/path choices simple and intentional.
Private prompts or reference images used for generation may be sent to or processed by the Gemini provider workflow.
For edits, the workflow passes a user-provided reference image path to the Gemini image-generation helper, implying the image may be processed by the external generation service.
For image editing (user provides a reference image): ... -i "/path/to/reference.png"
Avoid using sensitive personal or confidential reference images unless you are comfortable with the Gemini provider's handling of them.