List subscribers (email + phone leads) for a bio-link page. Sorted by signup date, newest first. Use this to answer \
AI agents call list_biolink_subscribers to retrieve information from Viraly MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves personal information (email addresses and phone numbers) from subscribers. While it is a Read operation (no data is modified or deleted), the sensitivity of the data being accessed (contact information) elevates the severity to high. If an AI agent with access to this tool is compromised or misused, it could expose a large volume of PII (Personally Identifiable Information).
From the tool's definition Tool name is 'list_biolink_subscribers' and description states it 'List subscribers (email + phone leads) for a bio-link page.' This retrieves and queries subscriber data without modifying or deleting it.
Attacks that exploit this kind of access
List subscribers (email + phone leads) for a bio-link page. Sorted by signup date, newest first. Use this to answer \. It is categorised as a Read tool in the Viraly MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Viraly MCP Server MCP server in PolicyLayer and add a rule for list_biolink_subscribers: 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 Viraly MCP Server. Nothing to install.
list_biolink_subscribers 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 list_biolink_subscribers 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 list_biolink_subscribers. 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.
list_biolink_subscribers is provided by the Viraly MCP Server MCP server (viraly-io/viraly-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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