rename_emotion_vocab · Jikan MCP: Risk & Policy

WHAT IT DOES

What rename_emotion_vocab does on Jikan

AI agents use rename_emotion_vocab 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 rename_emotion_vocab needs a policy

This tool creates or modifies data reversibly—it updates a vocab entry's name without deleting or destroying it, and the operation can be undone by renaming again. It does not execute code, delete data irreversibly, or involve financial transactions.

From the tool's definition The tool 'rename_emotion_vocab' modifies an existing vocabulary entry by changing its name while preserving its ID and associated events. The description explicitly states it 'renames' (updates) data.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

rename_emotion_vocab Rate-limited

rename_emotion_vocab 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": {
    "rename_emotion_vocab": {
      "limits": [
        {
          "counter": "rename_emotion_vocab_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 rename_emotion_vocab

What does the rename_emotion_vocab tool do? +

Rename an existing vocab entry. Preserves the my_id and all event associations. 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 rename_emotion_vocab? +

Register the Jikan MCP server in PolicyLayer and add a rule for rename_emotion_vocab: 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 rename_emotion_vocab? +

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

Can I rate-limit rename_emotion_vocab? +

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

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

rename_emotion_vocab 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.