download_svg · Allen Brain API MCP Server MCP: Risk & Policy

WHAT IT DOES

What download_svg does on Allen Brain API MCP Server

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

WHY IT NEEDS A POLICY

Why download_svg needs a policy

This tool retrieves data from the Allen Brain API and writes it to a local file. It reads from a remote source but has a side effect of creating/writing a file locally, making it a Write operation. The blast radius is low as it only saves an SVG overlay file locally.

From the tool's definition Download SVG structure overlay for a section image to a local file

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

download_svg Rate-limited

download_svg 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": {
    "download_svg": {
      "limits": [
        {
          "counter": "download_svg_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 Allen Brain API MCP Server, so you can run agents against it safely.

FAQ

Questions about download_svg

What does the download_svg tool do? +

Download SVG structure overlay for a section image to a local file. It is categorised as a Write tool in the Allen Brain API MCP 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 download_svg? +

Register the Allen Brain API MCP Server MCP server in PolicyLayer and add a rule for download_svg: 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 Allen Brain API MCP Server. Nothing to install.

What risk level is download_svg? +

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

Can I rate-limit download_svg? +

Yes. Add a rate_limit block to the download_svg 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 download_svg completely? +

Set action: deny in the PolicyLayer policy for download_svg. 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 download_svg? +

download_svg is provided by the Allen Brain API MCP Server MCP server (maflot/allenbrain-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.