patch_emotion_event · Jikan MCP: Risk & Policy

WHAT IT DOES

What patch_emotion_event does on Jikan

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

WHY IT NEEDS A POLICY

Why patch_emotion_event needs a policy

This tool modifies existing emotion event records reversibly by updating content and/or tags. It is a Write operation (update), not Destructive since changes are not irreversible and the record is retained. The blast radius is low—updating event metadata in a personal behavioral tracking app has minimal security impact unless the system is compromised at a broader level.

From the tool's definition Tool name 'patch_emotion_event' and description 'Update an existing event's content and/or tag' indicate modification of existing data via selective field updates.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

patch_emotion_event Rate-limited

patch_emotion_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": {
    "patch_emotion_event": {
      "limits": [
        {
          "counter": "patch_emotion_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 Jikan, so you can run agents against it safely.

FAQ

Questions about patch_emotion_event

What does the patch_emotion_event tool do? +

Update an existing event's content and/or tag. Only provided fields are changed. It is categorised as a Write tool in the Jikan MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on patch_emotion_event? +

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

What risk level is patch_emotion_event? +

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

Can I rate-limit patch_emotion_event? +

Yes. Add a rate_limit block to the patch_emotion_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 patch_emotion_event completely? +

Set action: deny in the PolicyLayer policy for patch_emotion_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 patch_emotion_event? +

patch_emotion_event is provided by the Jikan MCP server (thunderrabbit/jikan). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.