AI agents call list_notes to retrieve information from Standard Metrics MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The tool name 'list_notes' strongly suggests it retrieves or enumerates notes data, consistent with Read category operations. While the description is empty (lowering confidence), the naming pattern and context of a financial metrics/portfolio analysis server indicate this is a data retrieval tool with no side effects. No evidence suggests data modification, deletion, execution, or financial transactions.
From the tool's definition Tool named 'list_notes' with no description provided. Based on naming convention and sibling tools (get_company_notes_summary, get_company, etc.), this tool appears to retrieve/query notes data without modifying it.
Documented attack patterns abuse exactly the kind of access list_notes gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Standard Metrics MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for list_notes:
{
"version": "1",
"default": "deny",
"tools": {
"list_notes": {}
}
}list_notes is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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list_notes. It is categorised as a Read tool in the Standard Metrics MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Standard Metrics MCP Server MCP server in PolicyLayer and add a rule for list_notes: 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 Standard Metrics MCP Server. Nothing to install.
list_notes 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_notes 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_notes. 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_notes is provided by the Standard Metrics MCP Server MCP server (quaestor-technologies/smx-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Standard Metrics MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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19 Standard Metrics MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.