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Gemini CLI image resize convert compress watermark image_thumbnails

How to: Gemini CLI image resize convert compress watermark image_thumbnails

client:Gemini CLI transport:streamable-http tool:image_thumbnails

Add image resize convert compress watermark to Gemini CLI

  1. 01

    Open ~/.gemini/settings.json and merge this in. Keep any servers already there.

{
  "mcpServers": {
    "image-resize-convert-compress-watermark": {
      "httpUrl": "https://mcp.zovo.one/mcp/image"
    }
  }
}
  1. 02

    Save the file and restart Gemini CLI.

  2. 03

    Ask for something image_thumbnails does. Gemini CLI lists the server's tools on connect and calls image_thumbnails itself — you do not invoke it by name.

  3. 04

    If nothing happens, check the server is running and that image resize convert compress watermark's identifier in your config matches the one above exactly.

Gemini expands $VAR and ${VAR} inside env values, so a secret can live in your shell rather than this file. Gemini CLI docs

Set these first

image resize convert compress watermark will not start until these are set, so image_thumbnails never becomes available.

  • MCP_LICENSE_KEY

Same tool, other clients

This list was read from the server itself, by connecting to it and calling tools/list on 24 September 2026. It is what the server actually exposes, not what its listing claims.

Mutating and Read-only are read off each tool's name, not its schema — a hint, not a guarantee. The registry stores tool names only; connect the server for its live schemas.