Get comprehensive schema information for staged datasets including table structures, column descriptions, common aliases, example values, and recommended query patterns. Essential for understanding your staged data.
AI agents call get_staged_schema 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 is purely informational—it queries and returns metadata about staged datasets to help users understand available data structures. No data is modified, deleted, or executed. The low severity reflects that schema information is typically non-sensitive and retrieving it carries minimal risk even if accessed by an untrusted agent. The high confidence reflects clear read-only semantics with no side effects.
From the tool's definition Tool retrieves and returns schema information (table structures, column descriptions, aliases, example values) without modifying, executing, or deleting any data.
Attacks that exploit this kind of access
Get comprehensive schema information for staged datasets including table structures, column descriptions, common aliases, example values, and recommended query patterns. Essential for understanding your staged data. 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 get_staged_schema: 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.
get_staged_schema 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 get_staged_schema 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 get_staged_schema. 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.
get_staged_schema 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.
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