List sources in the active NotebookLM notebook.
AI agents call notebooklm_source_list to retrieve information from Notebooklm Codex without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves or queries data (sources within a notebook) without modifying, deleting, or executing any operations. It is a pure read operation with minimal security impact.
From the tool's definition Tool name contains 'list' and description explicitly states 'List sources in the active NotebookLM notebook' — a query operation with no side effects.
Attacks that exploit this kind of access
List sources in the active NotebookLM notebook. It is categorised as a Read tool in the Notebooklm Codex MCP Server, which means it retrieves data without modifying state.
Register the Notebooklm Codex MCP server in PolicyLayer and add a rule for notebooklm_source_list: 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 Notebooklm Codex. Nothing to install.
notebooklm_source_list 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 notebooklm_source_list 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 notebooklm_source_list. 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.
notebooklm_source_list is provided by the Notebooklm Codex MCP server (knowingdoing/notebooklm-codex). 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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