AI agents call list-all-notes to retrieve information from MCP Notes Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool queries and retrieves existing note data without creating, modifying, deleting, or executing any operations. It has no side effects and poses minimal risk if invoked by an AI agent—it simply surfaces existing data to the user. Severity is low because the blast radius is limited to information disclosure of notes the agent has access to.
From the tool's definition Tool description states "Read all stored notes" — a retrieval operation with no modification. The name "list-all-notes" and description explicitly indicate a read-only query.
Risk signalsBulk/mass operation — affects multiple targets
Documented attack patterns abuse exactly the kind of access list-all-notes gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and MCP Notes Server, and nothing reaches the server without passing your rules. This is the rule we recommend for list-all-notes:
{
"version": "1",
"default": "deny",
"tools": {
"list-all-notes": {}
}
}list-all-notes is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
Free to start. No card required.
Read all stored notes. It is categorised as a Read tool in the MCP Notes Server MCP Server, which means it retrieves data without modifying state.
Register the MCP Notes Server MCP server in PolicyLayer and add a rule for list-all-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 MCP Notes Server. Nothing to install.
list-all-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-all-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-all-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-all-notes is provided by the MCP Notes Server MCP server (truaxki/mcp-notes). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from MCP Notes Server, 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.
4 MCP Notes Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.