ingest_session_event · Maple MCP: Risk & Policy

WHAT IT DOES

What ingest_session_event does on Maple

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

WHY IT NEEDS A POLICY

Why ingest_session_event needs a policy

This tool writes/creates data by ingesting a new event record into an active trace. It is reversible in principle (the trace can be corrected or events can be flagged), and does not execute code, delete data, or involve financial transactions.

From the tool's definition Ingest one raw event from an external bridge or webhook into an active trace for near-real-time updates

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

ingest_session_event Rate-limited

ingest_session_event 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": {
    "ingest_session_event": {
      "limits": [
        {
          "counter": "ingest_session_event_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 Maple, so you can run agents against it safely.

FAQ

Questions about ingest_session_event

What does the ingest_session_event tool do? +

Ingest one raw event from an external bridge or webhook into an active trace for near-real-time updates. It is categorised as a Write tool in the Maple MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on ingest_session_event? +

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

What risk level is ingest_session_event? +

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

Can I rate-limit ingest_session_event? +

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

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

ingest_session_event is provided by the Maple MCP server (omar2001ramadan/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.