AI agents call list_doc_tabs to retrieve information from Google without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool only reads and returns information about the structure of a Google Doc (tabs with their titles, IDs, and indices). It has no side effects, does not modify any data, and poses minimal security risk if misused by an agent. It falls squarely into the Read category.
From the tool's definition Tool 'list_doc_tabs' performs a retrieval operation: 'List all tabs in a Google Doc (title, ID, index)'. It queries and returns metadata about document structure with no modification, creation, or deletion.
Attacks that exploit this kind of access
List all tabs in a Google Doc (title, ID, index). It is categorised as a Read tool in the Google MCP Server, which means it retrieves data without modifying state.
Register the Google MCP server in PolicyLayer and add a rule for list_doc_tabs: 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 Google. Nothing to install.
list_doc_tabs 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_doc_tabs 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_doc_tabs. 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_doc_tabs is provided by the Google MCP server (ztgluis/google-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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