create_entity_tool · Reltio MCP Server MCP: Risk & Policy

WHAT IT DOES

What create_entity_tool does on Reltio MCP Server

AI agents use create_entity_tool to create or update resources in Reltio MCP Server — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Reltio MCP Server environment.

WHY IT NEEDS A POLICY

Why create_entity_tool needs a policy

Creating entities in an MDM system is a reversible write operation that modifies the data store. The blast radius is high because mass or malicious entity creation could corrupt data integrity, pollute the master database, or cause downstream operational issues for dependent systems, but it is not destructive (deletable/reversible) or financial.

From the tool's definition Tool name 'create_entity_tool' indicates creation of entities in a master data management system. Server context shows this is Reltio's MDM platform handling 'entity operations' and 'master data management'.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

create_entity_tool Rate-limited

create_entity_tool stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "create_entity_tool": {
      "limits": [
        {
          "counter": "create_entity_tool_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Reltio MCP Server, so you can run agents against it safely.

FAQ

Questions about create_entity_tool

What does the create_entity_tool tool do? +

create_entity_tool. It is categorised as a Write tool in the Reltio MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on create_entity_tool? +

Register the Reltio MCP Server MCP server in PolicyLayer and add a rule for create_entity_tool: 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 Reltio MCP Server. Nothing to install.

What risk level is create_entity_tool? +

create_entity_tool is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit create_entity_tool? +

Yes. Add a rate_limit block to the create_entity_tool 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.

How do I block create_entity_tool completely? +

Set action: deny in the PolicyLayer policy for create_entity_tool. 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.

What MCP server provides create_entity_tool? +

create_entity_tool is provided by the Reltio MCP Server MCP server (reltio-ai/reltio-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.