kg_index_memory · Metis Public Health MCP: Risk & Policy

WHAT IT DOES

What kg_index_memory does on Metis Public Health

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

WHY IT NEEDS A POLICY

Why kg_index_memory needs a policy

The name implies writing or updating a knowledge graph index with memory entries. Sibling tools like 'add_memory_entry' support a pattern of write operations on local data. Without a description, confidence is low, but 'index' and 'memory' strongly suggest a Write operation (creating/updating index records). No evidence of deletion, execution, or financial operations.

From the tool's definition Tool name 'kg_index_memory' suggests indexing memory into a knowledge graph; description is empty and uninformative.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

kg_index_memory Rate-limited

kg_index_memory 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": {
    "kg_index_memory": {
      "limits": [
        {
          "counter": "kg_index_memory_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 Metis Public Health, so you can run agents against it safely.

FAQ

Questions about kg_index_memory

What does the kg_index_memory tool do? +

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

How do I enforce a policy on kg_index_memory? +

Register the Metis Public Health MCP server in PolicyLayer and add a rule for kg_index_memory: 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 Metis Public Health. Nothing to install.

What risk level is kg_index_memory? +

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

Can I rate-limit kg_index_memory? +

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

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

kg_index_memory is provided by the Metis Public Health MCP server (sveritg/metis_ph). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.