batch · NanoBanana MCP: Risk & Policy

WHAT IT DOES

What batch does on NanoBanana MCP

AI agents invoke batch to trigger actions in NanoBanana MCP. 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 batch needs a policy

This tool falls into Execute category because it triggers external operations (calls to gemini_generate_image, gemini_edit_image, gemini_chat, etc.) whose effects depend entirely on the arguments (the sequence of steps and their parameters). While individual sibling tools like gemini_generate_image are Write (create images), batch's ability to chain them sequentially amplifies risk.

From the tool's definition Tool name 'batch' combined with description 'Execute nanobanana tools in sequential steps' indicates the tool runs a sequence of operations programmatically.

Risk signalsBulk/mass operation — affects multiple targets

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

batch Rate-limited

batch 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": {
    "batch": {
      "limits": [
        {
          "counter": "batch_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 NanoBanana MCP, so you can run agents against it safely.

FAQ

Questions about batch

What does the batch tool do? +

Execute nanobanana tools in sequential steps, where each step. It is categorised as a Execute tool in the NanoBanana MCP MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on batch? +

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

What risk level is batch? +

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

Can I rate-limit batch? +

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

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

batch is provided by the NanoBanana MCP server (pistachiomatt/nanobanana-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.