List all note titles
AI agents call list_notes to retrieve information from Simple MCP Server Tutorial without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool only queries and returns existing data (note titles). It performs no creation, modification, deletion, or execution of external operations. It is a straightforward read operation with minimal security risk—the worst case is exposure of note metadata (titles), which is informational only.
From the tool's definition Tool name 'list_notes' and description 'List all note titles' indicate a retrieval operation with no side effects. Returns data (note titles) without modification or deletion.
Attacks that exploit this kind of access
List all note titles. It is categorised as a Read tool in the Simple MCP Server Tutorial MCP Server, which means it retrieves data without modifying state.
Register the Simple MCP Server Tutorial 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 Simple MCP Server Tutorial. 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 Simple MCP Server Tutorial MCP server (xarsenicx/simple-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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