batch_update_items · Skema MCP Server MCP: Risk & Policy

WHAT IT DOES

What batch_update_items does on Skema MCP Server

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

WHY IT NEEDS A POLICY

Why batch_update_items needs a policy

This tool creates or modifies data reversibly by updating multiple collection items. While reversible (vs. Destructive), it modifies data at scale, warranting high severity due to potential blast radius if an AI agent misuses batch update logic without proper validation.

From the tool's definition Tool name 'batch_update_items' and description 'Met à jour plusieurs items en une seule requête' (Updates multiple items in a single request) indicate modification of existing data. The batch operation amplifies the impact scope.

Risk signalsBulk/mass operation — affects multiple targets

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

batch_update_items Rate-limited

batch_update_items 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": {
    "batch_update_items": {
      "limits": [
        {
          "counter": "batch_update_items_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 Skema MCP Server, so you can run agents against it safely.

FAQ

Questions about batch_update_items

What does the batch_update_items tool do? +

Met à jour plusieurs items en une seule requête. It is categorised as a Write tool in the Skema MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on batch_update_items? +

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

What risk level is batch_update_items? +

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

Can I rate-limit batch_update_items? +

Yes. Add a rate_limit block to the batch_update_items 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_update_items completely? +

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

batch_update_items is provided by the Skema MCP Server MCP server (skemacms/mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.