AI agents call list_memories to retrieve information from Novyx without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves and queries stored memories—a classic Read operation. It has no capability to modify, delete, or execute external actions. The optional tag filtering is still a retrieval mechanism.
From the tool's definition Tool name is 'list_memories' and description states 'List stored memories with optional tag filtering.' The verb 'list' and the action of filtering/retrieving indicate a read-only query operation with no modification or side effects.
Documented attack patterns abuse exactly the kind of access list_memories gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Novyx, and nothing reaches the server without passing your rules. This is the rule we recommend for list_memories:
{
"version": "1",
"default": "deny",
"tools": {
"list_memories": {}
}
}list_memories is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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List stored memories with optional tag filtering. It is categorised as a Read tool in the Novyx MCP Server, which means it retrieves data without modifying state.
Register the Novyx MCP server in PolicyLayer and add a rule for list_memories: 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 Novyx. Nothing to install.
list_memories 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_memories 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_memories. 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_memories is provided by the Novyx MCP server (novyxlabs/novyx-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 120 Novyx tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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120 Novyx tools catalogued and risk-classified — across an index of 42,500+ MCP servers.