AI agents call list_notebooks to retrieve information from Jopmcp without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool performs a read-only operation that retrieves and returns a list of notebooks. It has no side effects, does not modify data, and does not execute code or trigger external operations. The blast radius of misuse is minimal—an attacker gains only informational access to the notebook structure. Classification as Read is appropriate.
From the tool's definition Tool name 'list_notebooks' and description 'List all notebooks in Joplin' indicate a query operation that retrieves notebook metadata without modification.
Attacks that exploit this kind of access
List all notebooks in Joplin. It is categorised as a Read tool in the Jopmcp MCP Server, which means it retrieves data without modifying state.
Register the Jop MCP server in PolicyLayer and add a rule for list_notebooks: 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 Jopmcp. Nothing to install.
list_notebooks 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_notebooks 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_notebooks. 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_notebooks is provided by the Jop MCP server (jpfrancoia/jopmcp). 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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