AI agents call get_blocked_inheritance_ous to retrieve information from LegacyMCP without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool queries and retrieves information about Organizational Units (OUs) that have Group Policy Object (GPO) inheritance blocked. It performs no data creation, modification, deletion, code execution, or financial operations. The 'get_' prefix and 'Return' verb confirm this is a passive read operation.
From the tool's definition Tool name begins with 'get_' and description states 'Return OUs with GPO inheritance blocked' — a read-only query operation that retrieves Active Directory data without modification.
Attacks that exploit this kind of access
Return OUs with GPO inheritance blocked. It is categorised as a Read tool in the LegacyMCP MCP Server, which means it retrieves data without modifying state.
Register the Legacy MCP server in PolicyLayer and add a rule for get_blocked_inheritance_ous: 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 LegacyMCP. Nothing to install.
get_blocked_inheritance_ous 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 get_blocked_inheritance_ous 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 get_blocked_inheritance_ous. 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.
get_blocked_inheritance_ous is provided by the Legacy MCP server (marco-lelli/legacy-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.
Teams ship this data inside their own products. See what a licence covers →