List all registered software vendors in the vulnerability database. Optionally filter by category (e.g.
AI agents call list_vendors to retrieve information from Vulnerability Registry 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 and lists vendor information from a read-only database. There are no side effects, data modifications, code execution, or destructive operations. The optional filtering capability does not change the fundamental nature of the operation—it remains a passive data retrieval. Blast radius is minimal as misuse would only expose vendor names already in the database.
From the tool's definition Tool name is 'list_vendors' and description states 'List all registered software vendors in the vulnerability database' with optional filtering. This is a query/retrieval operation with no modification or destructive capability.
Attacks that exploit this kind of access
List all registered software vendors in the vulnerability database. Optionally filter by category (e.g. It is categorised as a Read tool in the Vulnerability Registry MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Vulnerability Registry MCP Server MCP server in PolicyLayer and add a rule for list_vendors: 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 Vulnerability Registry MCP Server. Nothing to install.
list_vendors 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_vendors 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_vendors. 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_vendors is provided by the Vulnerability Registry MCP Server MCP server (orcohen5/vulnerability-registry). 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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