List available products, versions, languages, and document types from the local index.
AI agents call list_index_facets to retrieve information from UserGate MCP without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves and enumerates metadata facets (products, versions, languages, document types) from a local documentation index. It performs a query with no side effects, no data modification, no code execution, and no destructive actions. It is clearly a Read operation with low blast radius if misused by an AI agent—the worst case would be enumeration of available documentation metadata.
From the tool's definition Tool name 'list_index_facets' and description 'List available products, versions, languages, and document types from the local index' indicate a retrieval operation that queries metadata without modification or execution.
Attacks that exploit this kind of access
List available products, versions, languages, and document types from the local index. It is categorised as a Read tool in the UserGate MCP MCP Server, which means it retrieves data without modifying state.
Register the UserGate MCP server in PolicyLayer and add a rule for list_index_facets: 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 UserGate MCP. Nothing to install.
list_index_facets 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_index_facets 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_index_facets. 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_index_facets is provided by the UserGate MCP server (neonsummit/usergate-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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