AI agents call list_all_gpos to retrieve information from BloodHound MCP without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves information about GPOs without modifying, executing, or deleting anything. However, severity is elevated to 'medium' rather than 'low' because GPO enumeration is reconnaissance that could enable subsequent attack chains (e.g., identifying misconfigured policies, finding paths to privilege escalation, or locating targets for GPO-based attacks).
From the tool's definition Tool name 'list_all_gpos' and description 'List all GPO(s)' indicate a query/retrieval operation that enumerates Group Policy Objects in Active Directory. The verb 'list' is a canonical Read operation.
Documented attack patterns abuse exactly the kind of access list_all_gpos gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and BloodHound MCP, and nothing reaches the server without passing your rules. This is the rule we recommend for list_all_gpos:
{
"version": "1",
"default": "deny",
"tools": {
"list_all_gpos": {}
}
}list_all_gpos 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 GPO(s). It is categorised as a Read tool in the BloodHound MCP MCP Server, which means it retrieves data without modifying state.
Register the BloodHound MCP server in PolicyLayer and add a rule for list_all_gpos: 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 BloodHound MCP. Nothing to install.
list_all_gpos 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_all_gpos 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_all_gpos. 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_all_gpos is provided by the BloodHound MCP server (stevenyu113228/bloodhound-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 106 BloodHound MCP tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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106 BloodHound MCP tools catalogued and risk-classified — across an index of 42,500+ MCP servers.