AI agents call list_agents to retrieve information from Pypi:asqav 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 existing agent data without side effects. It is a read-only operation that gathers information about organizational agents. While the data returned could inform an attacker about agent infrastructure, listing is inherently a Read operation. Severity is low because it involves querying metadata with no destructive capability, though access control should still protect this information.
From the tool's definition Tool name 'list_agents' and description 'List all registered AI agents in the organization' indicate a query/enumeration operation with no modification or execution.
Documented attack patterns abuse exactly the kind of access list_agents gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Pypi:asqav, and nothing reaches the server without passing your rules. This is the rule we recommend for list_agents:
{
"version": "1",
"default": "deny",
"tools": {
"list_agents": {}
}
}list_agents is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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List all registered AI agents in the organization. It is categorised as a Read tool in the Pypi:asqav MCP Server, which means it retrieves data without modifying state.
Register the Pypi:asqav MCP server in PolicyLayer and add a rule for list_agents: 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 Pypi:asqav. Nothing to install.
list_agents 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_agents 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_agents. 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_agents is provided by the Pypi:asqav MCP server (jagmarques/asqav-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Pypi:asqav, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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15 Pypi:asqav tools catalogued and risk-classified — across an index of 43,000+ MCP servers.