batch_search_multiple_queries

THE RISK

Low Risk

Why batch_search_multiple_queries needs a policy

This tool queries the PubMed literature database to retrieve article information based on search parameters. It is a read-only operation that returns search results without modifying, executing code, or causing destructive changes. The parallel execution aspect is an implementation detail that does not elevate the risk category.

From the tool's definition Tool performs 'multiple PubMed searches' which retrieves scientific articles from a database. The description indicates it 'searches' rather than creates, modifies, or deletes data. No side effects beyond data retrieval.

Risk signalsBulk/mass operation — affects multiple targets

Documented attack patterns abuse exactly the kind of access batch_search_multiple_queries gives an agent:

POLICY

How to control batch_search_multiple_queries

PolicyLayer is an MCP gateway — it sits between your AI agents and NCBI Literature Search MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for batch_search_multiple_queries:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "batch_search_multiple_queries": {}
  }
}

batch_search_multiple_queries is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.

Create a free account and register NCBI Literature Search MCP Server — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

CAP THIS TOOL →

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EXPLORE

Related tools and policies

More NCBI Literature Search MCP Server tools

Destructive clear_cache Clear expired cache entries. Destructive reset_analytics Reset analytics data (use with caution - this will clear all collected metrics). Read advanced_search Perform advanced PubMed searches with multiple criteria. Read batch_get_article_details Fetch article details for many PMIDs efficiently in batches. Read cache_stats Get cache performance statistics. Read get_analytics_summary Get comprehensive analytics summary including usage stats, performance metrics, and system Read get_article_details Fetch detailed information for specific PubMed articles. Read get_detailed_metrics Get detailed performance metrics for the specified time period (default: last 24 hours).

All 12 NCBI Literature Search MCP Server tools →

Read tools on other servers

M-Team MCP Server get_torrent_detail YouTube MCP Server search_channel Android Forensics ADB MCP Server parse_browser_history 0xarchive web3_challenge

Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Data exfiltration → How read access becomes an exfiltration channel when chained with untrusted content.
MCP token cost → What connecting this server costs in context-window tokens on every request.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about batch_search_multiple_queries

What does the batch_search_multiple_queries tool do? +

Perform multiple PubMed searches in parallel for efficiency. It is categorised as a Read tool in the NCBI Literature Search MCP Server MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on batch_search_multiple_queries? +

Register the NCBI Literature Search MCP Server MCP server in PolicyLayer and add a rule for batch_search_multiple_queries: 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 NCBI Literature Search MCP Server. Nothing to install.

What risk level is batch_search_multiple_queries? +

batch_search_multiple_queries is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit batch_search_multiple_queries? +

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

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

batch_search_multiple_queries is provided by the NCBI Literature Search MCP Server MCP server (vitorpavinato/ncbi-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every NCBI Literature Search MCP Server tool call.

Start from NCBI Literature Search MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →