AI agents call download_paper to retrieve information from UniArticles MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves and downloads publicly accessible academic papers from ArXiv. It has no side effects—it does not create, modify, delete, or execute any operations. The download is a read-only operation that accesses existing data. Severity is low because the blast radius is limited to unauthorized access to academic papers that are already publicly available, posing minimal risk even with misuse.
From the tool's definition Tool name 'download_paper' and description 'Download an ArXiv paper as PDF' indicates retrieval of publicly available academic content with no modification or deletion.
Documented attack patterns abuse exactly the kind of access download_paper gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and UniArticles MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for download_paper:
{
"version": "1",
"default": "deny",
"tools": {
"download_paper": {}
}
}download_paper is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Download an ArXiv paper as PDF. It is categorised as a Read tool in the UniArticles MCP Server MCP Server, which means it retrieves data without modifying state.
Register the UniArticles MCP Server MCP server in PolicyLayer and add a rule for download_paper: 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 UniArticles MCP Server. Nothing to install.
download_paper 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 download_paper 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 download_paper. 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.
download_paper is provided by the UniArticles MCP Server MCP server (thinktraveller/uniarticles_mcpserver). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from UniArticles MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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15 UniArticles MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.