fetch_unsplash_images · SensorMCP Server MCP: Risk & Policy

WHAT IT DOES

What fetch_unsplash_images does on SensorMCP Server

AI agents use fetch_unsplash_images to create or update resources in SensorMCP Server — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your SensorMCP Server environment.

WHY IT NEEDS A POLICY

Why fetch_unsplash_images needs a policy

This tool fetches external images and writes them to a local directory (RAW_IMAGES_DIR). It creates new files on the filesystem, which is a reversible write operation. It does not execute code, delete data, or involve financial transactions.

From the tool's definition Download Unsplash images matching *query* into RAW_IMAGES_DIR

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

fetch_unsplash_images Rate-limited

fetch_unsplash_images stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "fetch_unsplash_images": {
      "limits": [
        {
          "counter": "fetch_unsplash_images_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches SensorMCP Server, so you can run agents against it safely.

FAQ

Questions about fetch_unsplash_images

What does the fetch_unsplash_images tool do? +

Download Unsplash images matching *query* into RAW_IMAGES_DIR. It is categorised as a Write tool in the SensorMCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on fetch_unsplash_images? +

Register the SensorMCP Server MCP server in PolicyLayer and add a rule for fetch_unsplash_images: 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 SensorMCP Server. Nothing to install.

What risk level is fetch_unsplash_images? +

fetch_unsplash_images is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit fetch_unsplash_images? +

Yes. Add a rate_limit block to the fetch_unsplash_images 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.

How do I block fetch_unsplash_images completely? +

Set action: deny in the PolicyLayer policy for fetch_unsplash_images. 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.

What MCP server provides fetch_unsplash_images? +

fetch_unsplash_images is provided by the SensorMCP Server MCP server (sensormcp/sensor-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.