Check for Google Groups that include external members
AI agents call check_groups_external_members to retrieve information from Google Workspace Compliance Audit Tool without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves and audits group membership information as part of a compliance audit workflow. It has no side effects—it only reads existing group configurations and reports findings. The blast radius of misuse is minimal: an attacker could discover which groups have external members, but cannot modify groups, delete data, or trigger external actions.
From the tool's definition Tool name and description indicate a query operation: 'Check for Google Groups that include external members' performs an assessment/retrieval of group membership data without modification, deletion, or execution of external operations.
Attacks that exploit this kind of access
Check for Google Groups that include external members. It is categorised as a Read tool in the Google Workspace Compliance Audit Tool MCP Server, which means it retrieves data without modifying state.
Register the Google Workspace Compliance Audit Tool MCP server in PolicyLayer and add a rule for check_groups_external_members: 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 Workspace Compliance Audit Tool. Nothing to install.
check_groups_external_members 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 check_groups_external_members 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 check_groups_external_members. 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.
check_groups_external_members is provided by the Google Workspace Compliance Audit Tool MCP server (sean-m-sweeney/googleworkspaceaudit). 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.
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