emotion_metan_aska · PVV MCP Server MCP: Risk & Policy

WHAT IT DOES

What emotion_metan_aska does on PVV MCP Server

AI agents invoke emotion_metan_aska to trigger actions in PVV MCP Server. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call — builds kicked off, notifications sent, workflows started.

WHY IT NEEDS A POLICY

Why emotion_metan_aska needs a policy

This tool triggers an external operation on an avatar system (causing it to display emotional expressions), which goes beyond simple data retrieval or writing. It executes a command against the VOICEVOX/avatar API to produce an observable effect. The description is brief and in Japanese, slightly lowering confidence, but the pattern matches sibling tools like 'emotion' and 'speak' which are action-triggering tools.

From the tool's definition 「惣流・アスカ・ラングレー」のアバターに感情表現をさせるツール — triggers an avatar to express emotions, implying an external operation/action on a character avatar system

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

emotion_metan_aska Rate-limited

emotion_metan_aska stays usable, but rate-capped — a runaway agent can't fire it dozens of times a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "emotion_metan_aska": {
      "limits": [
        {
          "counter": "emotion_metan_aska_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

RATE-LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches PVV MCP Server, so you can run agents against it safely.

FAQ

Questions about emotion_metan_aska

What does the emotion_metan_aska tool do? +

エヴァンゲリオンの「惣流・アスカ・ラングレー」のアバターに感情表現をさせるツール。. It is categorised as a Execute tool in the PVV MCP Server MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on emotion_metan_aska? +

Register the PVV MCP Server MCP server in PolicyLayer and add a rule for emotion_metan_aska: 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 PVV MCP Server. Nothing to install.

What risk level is emotion_metan_aska? +

emotion_metan_aska is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.

Can I rate-limit emotion_metan_aska? +

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

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

emotion_metan_aska is provided by the PVV MCP Server MCP server (lambda-tuber/pvv-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.