link · MegaMemory MCP: Risk & Policy

WHAT IT DOES

What link does on MegaMemory

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

WHY IT NEEDS A POLICY

Why link needs a policy

This tool creates new relationships in a persistent knowledge graph but does not delete data or execute arbitrary code. The effect is reversible (relationships can be removed via 'remove_concept' or modified via subsequent 'link' calls).

From the tool's definition Tool name 'link' combined with description 'Create a relationship between two existing concepts' indicates it creates or modifies data (a relationship graph) reversibly.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

link Rate-limited

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": {
    "link": {
      "limits": [
        {
          "counter": "link_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 MegaMemory, so you can run agents against it safely.

FAQ

Questions about link

What does the link tool do? +

Create a relationship between two existing concepts. It is categorised as a Write tool in the MegaMemory MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on link? +

Register the MegaMemory MCP server in PolicyLayer and add a rule for 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 MegaMemory. Nothing to install.

What risk level is link? +

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

Can I rate-limit link? +

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

Set action: deny in the PolicyLayer policy for 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 link? +

link is provided by the MegaMemory MCP server (0xk3vin/megamemory). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

// THE FULL RECORD

link is one line of MegaMemory's registry record.

The record carries the whole server: verified identity, auth posture, risk grade, every tool classified, recommended policy — re-checked continuously.

Teams ship this data inside their own products. See what a licence covers →