Get comprehensive metadata about NCBI Entrez databases including field statistics, last update dates, and available links to other databases. Covers all 38+ Entrez databases from PubMed to protein sequences.\n\n📚 Major Databases: pubmed (literature), protein (sequences), nuccore (nucleotides), g...
AI agents call einfo to retrieve information from Entrez MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool only retrieves metadata about databases (field statistics, update dates, available links). It has no side effects, does not modify any data, and purely queries informational content about NCBI Entrez databases.
From the tool's definition Get comprehensive metadata about NCBI Entrez databases including field statistics, last update dates, and available links to other databases
Attacks that exploit this kind of access
Get comprehensive metadata about NCBI Entrez databases including field statistics, last update dates, and available links to other databases. Covers all 38+ Entrez databases from PubMed to protein sequences.\n\n📚 Major Databases: pubmed (literature), protein (sequences), nuccore (nucleotides), gene (gene records), structure (3D structures)\n🔗 Use Cases: \n• Discover searchable fields for precise queries\n• Find cross-database links for related data\n• Check database size and update status\n• Plan search strategies with field information. It is categorised as a Read tool in the Entrez MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Entrez MCP Server MCP server in PolicyLayer and add a rule for einfo: 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 Entrez MCP Server. Nothing to install.
einfo 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 einfo 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 einfo. 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.
einfo is provided by the Entrez MCP Server MCP server (leongxj123/entrez-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
Teams ship this data inside their own products. See what a licence covers →