notebook_add_text · NotebookLM MCP Server MCP: Risk & Policy

WHAT IT DOES

What notebook_add_text does on NotebookLM MCP Server

AI agents use notebook_add_text to create or update resources in NotebookLM MCP Server — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your NotebookLM MCP Server environment.

WHY IT NEEDS A POLICY

Why notebook_add_text needs a policy

This tool adds (creates) a new text source within a notebook, which is a reversible modification operation. It does not execute code, delete data, or move money. While it modifies notebook state, the action is non-destructive and can be undone or overwritten.

From the tool's definition Tool name 'notebook_add_text' and description 'Add pasted text as source' indicate the tool creates or modifies notebook content by adding a new text source.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

notebook_add_text Rate-limited

notebook_add_text stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "notebook_add_text": {
      "limits": [
        {
          "counter": "notebook_add_text_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches NotebookLM MCP Server, so you can run agents against it safely.

FAQ

Questions about notebook_add_text

What does the notebook_add_text tool do? +

Add pasted text as source. It is categorised as a Write tool in the NotebookLM MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on notebook_add_text? +

Register the NotebookLM MCP Server MCP server in PolicyLayer and add a rule for notebook_add_text: 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 MCP Server. Nothing to install.

What risk level is notebook_add_text? +

notebook_add_text is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit notebook_add_text? +

Yes. Add a rate_limit block to the notebook_add_text 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.

How do I block notebook_add_text completely? +

Set action: deny in the PolicyLayer policy for notebook_add_text. 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.

What MCP server provides notebook_add_text? +

notebook_add_text is provided by the NotebookLM MCP Server MCP server (ran-ai-agency/notebooklm-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.