List all entity type codes and descriptions from KNF taxonomy.
AI agents call list_entity_types to retrieve information from e-RUP KNF MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool queries and returns static reference data (entity type codes and descriptions) from the KNF taxonomy. It performs no modifications, deletions, or external operations. The action is purely informational retrieval, making it a Read category tool with low severity since misconfiguration or misuse would only expose publicly available reference metadata with minimal blast radius.
From the tool's definition Tool name 'list_entity_types' and description 'List all entity type codes and descriptions' indicate a retrieval operation that returns taxonomy/reference data with no side effects.
Attacks that exploit this kind of access
List all entity type codes and descriptions from KNF taxonomy. It is categorised as a Read tool in the e-RUP KNF MCP Server MCP Server, which means it retrieves data without modifying state.
Register the e-RUP KNF MCP Server MCP server in PolicyLayer and add a rule for list_entity_types: 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 e-RUP KNF MCP Server. Nothing to install.
list_entity_types 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_entity_types 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_entity_types. 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_entity_types is provided by the e-RUP KNF MCP Server MCP server (kymylyy/erup2.0-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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