AI agents call list_personas to retrieve information from AI Cognitive Nexus without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The tool performs a query/list operation to retrieve metadata about existing personas. It has no side effects, does not modify data, execute code, delete resources, or move money. The highest risk would be information disclosure if persona data is sensitive, but that is a low-severity read access concern. Confidence is high because the description and name clearly indicate a read-only list operation.
From the tool's definition Tool name 'list_personas' and description indicating it 'lists all available persona information records' and 'retrieves persona information record keys' — purely retrieval operations with no modification or execution.
Documented attack patterns abuse exactly the kind of access list_personas gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and AI Cognitive Nexus, and nothing reaches the server without passing your rules. This is the rule we recommend for list_personas:
{
"version": "1",
"default": "deny",
"tools": {
"list_personas": {}
}
}list_personas is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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列出所有可用的人物信息记录，获取人物信息记录的 key 以加载个人信息。. It is categorised as a Read tool in the AI Cognitive Nexus MCP Server, which means it retrieves data without modifying state.
Register the AI Cognitive Nexus MCP server in PolicyLayer and add a rule for list_personas: 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 AI Cognitive Nexus. Nothing to install.
list_personas 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_personas 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_personas. 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_personas is provided by the AI Cognitive Nexus MCP server (simonutd/ai-cognitive-nexus-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from AI Cognitive Nexus, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
Free to start. No card required.
22 AI Cognitive Nexus tools catalogued and risk-classified — across an index of 43,000+ MCP servers.