AI agents call search_biorxiv_key_words to retrieve information from bioRxiv-MCP-Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool performs a search query against the bioRxiv preprint repository, which is a retrieval operation with no side effects. It matches the 'Read' category definition of querying data without modification. Severity is low because searching public preprints poses minimal risk even if misused by an AI agent.
From the tool's definition Tool name 'search_biorxiv_key_words' combined with server description stating it 'allows AI models to search for biology preprints' indicates a search operation.
Documented attack patterns abuse exactly the kind of access search_biorxiv_key_words gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and bioRxiv-MCP-Server, and nothing reaches the server without passing your rules. This is the rule we recommend for search_biorxiv_key_words:
{
"version": "1",
"default": "deny",
"tools": {
"search_biorxiv_key_words": {}
}
}search_biorxiv_key_words is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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search_biorxiv_key_words. It is categorised as a Read tool in the bioRxiv-MCP-Server MCP Server, which means it retrieves data without modifying state.
Register the bioRxiv-MCP-Server MCP server in PolicyLayer and add a rule for search_biorxiv_key_words: 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 bioRxiv-MCP-Server. Nothing to install.
search_biorxiv_key_words 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 search_biorxiv_key_words 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 search_biorxiv_key_words. 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.
search_biorxiv_key_words is provided by the bioRxiv-MCP-Server MCP server (jackkuo666/biorxiv-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from bioRxiv-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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3 bioRxiv-MCP-Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.