List all members of a GitLab group (including inherited members)
AI agents call list_group_members to retrieve information from Gitlab without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves and lists group membership information without creating, modifying, deleting, or executing anything. It is a read-only data retrieval operation. Severity is low because listing members is typically low-impact information already available to authenticated users with group access, and misuse would not cause data loss, financial harm, or unauthorized actions.
From the tool's definition Tool name is 'list_group_members' and description states it 'List all members of a GitLab group (including inherited members)' — a pure query/retrieval operation with no modification, deletion, or execution of code.
Documented attack patterns abuse exactly the kind of access list_group_members gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Gitlab, and nothing reaches the server without passing your rules. This is the rule we recommend for list_group_members:
{
"version": "1",
"default": "deny",
"tools": {
"list_group_members": {}
}
}list_group_members is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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List all members of a GitLab group (including inherited members). It is categorised as a Read tool in the Gitlab MCP Server, which means it retrieves data without modifying state.
Register the Gitlab MCP server in PolicyLayer and add a rule for list_group_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 Gitlab. Nothing to install.
list_group_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 list_group_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 list_group_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.
list_group_members is provided by the Gitlab MCP server (yoda-digital/mcp-gitlab-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 88 Gitlab tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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88 Gitlab tools catalogued and risk-classified — across an index of 42,500+ MCP servers.