dummy_image_url
Generate a placeholder image URL with custom size, colors, and text.
This record as markdown: /tools/io-github-malamutemayhem-unclick-mcp-server/dummy-image-url.md
What dummy_image_url does on UnClick
AI agents call dummy_image_url to retrieve information from UnClick without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
| Parameter | Type | Required | Description |
|---|---|---|---|
text | string | — | Text to show on the image |
width | number | — | Width in pixels (default 600) |
height | number | — | Height in pixels (default 400) |
bg_color | string | — | Background hex color without # (default cccccc) |
fg_color | string | — | Text hex color without # (default 000000) |
Parameters from the server's own tool schema.
Why dummy_image_url is rated Low
This tool generates and returns a placeholder image URL based on input parameters. It is a read-only operation that retrieves (or generates and returns) a resource URL without creating persistent data, modifying systems, executing code, or causing destructive changes. The most severe potential misuse would be generating many URLs to consume resources, but this remains a low-severity read operation.
From the tool's definition Tool name 'dummy_image_url' and description 'Generate a placeholder image URL with custom size, colors, and text' indicate retrieval of a generated resource URL with no side effects, data modification, or external state changes.
Attacks that exploit this kind of access
The rule that runs dummy_image_url safely
PolicyLayer is an MCP gateway: it sits between your AI agents and UnClick, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For dummy_image_url, this is the rule to start with:
dummy_image_url is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.
The button opens the PolicyLayer dashboard: create your workspace, connect UnClick, apply this rule, and every dummy_image_url call is checked against it from then on.
Questions about dummy_image_url
Generate a placeholder image URL with custom size, colors, and text. It is categorised as a Read tool in the UnClick MCP Server, which means it retrieves data without modifying state.
dummy_image_url accepts 5 parameters: text, width, height, bg_color, fg_color. The full parameter table on this page comes from the server's own tool schema.
Register the UnClick MCP server in PolicyLayer and add a rule for dummy_image_url: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches UnClick. Nothing to install.
dummy_image_url is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the dummy_image_url rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.
Set action: deny in the PolicyLayer policy for dummy_image_url. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.
dummy_image_url is provided by the UnClick MCP server (@unclick/mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
More on UnClick, and thousands of servers like it.
This server
Across the catalogue