picsum_random_url
Generate a random placeholder image URL from Lorem Picsum (no fetch needed).
This record as markdown: /tools/io-github-malamutemayhem-unclick-mcp-server/picsum-random-url.md
What picsum_random_url does on UnClick
AI agents call picsum_random_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 |
|---|---|---|---|
blur | number | — | Blur amount (1-10) |
width | number | — | Image width in pixels (default 800) |
height | number | — | Image height in pixels (default 600) |
grayscale | boolean | — | Convert to grayscale |
Parameters from the server's own tool schema.
Why picsum_random_url is rated Low
This tool retrieves/generates data (a random image URL) without side effects, modifications, or triggering external operations beyond URL generation. It is purely informational—typical of placeholder/dummy data services used in development. The low severity reflects minimal blast radius: an AI agent misusing this tool could only spam requests or pollute logs with URLs, causing no data loss or system compromise.
From the tool's definition Tool generates and returns a URL for a placeholder image; performs no modification, deletion, or execution of external code. Description explicitly notes 'no fetch needed,' indicating a passive data generation operation.
Attacks that exploit this kind of access
The rule that runs picsum_random_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 picsum_random_url, this is the rule to start with:
picsum_random_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 picsum_random_url call is checked against it from then on.
Questions about picsum_random_url
Generate a random placeholder image URL from Lorem Picsum (no fetch needed). It is categorised as a Read tool in the UnClick MCP Server, which means it retrieves data without modifying state.
picsum_random_url accepts 4 parameters: blur, width, height, grayscale. 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 picsum_random_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.
picsum_random_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 picsum_random_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 picsum_random_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.
picsum_random_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.
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