List the available tools, their operations, and guidance for usage.
AI agents call entrez-capabilities 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 performs an informational read-only operation to enumerate and describe available tools and their capabilities. It has no side effects, does not execute code or commands, and does not modify or delete data. The blast radius of misuse is minimal—an agent might gain knowledge of available operations but cannot directly harm systems, data, or external services through this tool alone.
From the tool's definition Tool name 'entrez-capabilities' and description 'List the available tools, their operations, and guidance for usage' indicate a query/discovery operation that retrieves information about available functionality without modifying, executing, or deleting any…
Attacks that exploit this kind of access
List the available tools, their operations, and guidance for usage. 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 entrez-capabilities: 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.
entrez-capabilities 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 entrez-capabilities 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 entrez-capabilities. 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.
entrez-capabilities 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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