hippo_entity_link

P2.b — aggiunge edge diretto src→dst con predicate

SERVERVerimem SOURCEaureliocpr-ctrl/verimem

Medium RISK CLASS

Category Write

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/verimem/hippo-entity-link.md

WHAT IT DOES

What hippo_entity_link does on Verimem

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

RISK

Why hippo_entity_link is rated Medium

This tool creates a new directional link (edge) between two entities with a predicate in the memory graph. It is a Write operation as it adds new data (a relationship) to the store. It is reversible in principle (the edge can be removed), so it does not qualify as Destructive.

From the tool's definition 'aggiunge edge diretto src→dst con predicate' — 'aggiunge' means 'adds', indicating creation of a directed edge (relationship) between two entities

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs hippo_entity_link safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Verimem, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For hippo_entity_link, this is the rule to start with:

hippo_entity_link Rate-limited

hippo_entity_link 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": {
    "hippo_entity_link": {
      "limits": [
        {
          "counter": "hippo_entity_link_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Verimem, apply this rule, and every hippo_entity_link call is checked against it from then on.

FAQ

Questions about hippo_entity_link

What does the hippo_entity_link tool do? +

P2.b — aggiunge edge diretto src→dst con predicate. It is categorised as a Write tool in the Verimem MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on hippo_entity_link? +

Register the Verimem MCP server in PolicyLayer and add a rule for hippo_entity_link: 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 Verimem. Nothing to install.

What risk level is hippo_entity_link? +

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

Can I rate-limit hippo_entity_link? +

Yes. Add a rate_limit block to the hippo_entity_link 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 hippo_entity_link completely? +

Set action: deny in the PolicyLayer policy for hippo_entity_link. 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 hippo_entity_link? +

hippo_entity_link is provided by the Verimem MCP server (aureliocpr-ctrl/verimem). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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