AI agents call get_certification_authorities 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.
The tool retrieves certification authority information from Active Directory with no mutations, side effects, or operations. While the description is empty (reducing confidence slightly), the consistent 'get_' naming pattern across sibling tools and the lack of any destructive, write, or execute indicators classify this as a Read operation.
From the tool's definition Tool name 'get_certification_authorities' follows the 'get_' prefix pattern consistent with other Read tools on this server (get_computers, get_dc_features, get_dc_services, etc.).
Attacks that exploit this kind of access
get_certification_authorities. 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_certification_authorities: 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_certification_authorities 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_certification_authorities 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_certification_authorities. 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_certification_authorities 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.
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