data_update_item

Shallow-merge fields into an item (set a key to null to remove it). Uses optimistic concurrency.

SERVEROpen Mcp Apps SOURCE@2nd1st/open-mcp-apps

Medium RISK CLASS

Category Write

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/2nd1st-open-mcp-apps/data-update-item.md

WHAT IT DOES

What data_update_item does on Open Mcp Apps

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

RISK

Why data_update_item is rated Medium

This tool modifies existing data items by merging fields, which is a reversible write operation. Setting a key to null removes it, but the operation is described as a merge/update (not a purge or delete of the whole item), and optimistic concurrency suggests it's designed for safe, controlled modifications.

From the tool's definition Shallow-merge fields into an item (set a key to null to remove it)

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs data_update_item safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Open Mcp Apps, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For data_update_item, this is the rule to start with:

data_update_item Rate-limited

data_update_item 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": {
    "data_update_item": {
      "limits": [
        {
          "counter": "data_update_item_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Open Mcp Apps, apply this rule, and every data_update_item call is checked against it from then on.

FAQ

Questions about data_update_item

What does the data_update_item tool do? +

Shallow-merge fields into an item (set a key to null to remove it). Uses optimistic concurrency. It is categorised as a Write tool in the Open Mcp Apps MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on data_update_item? +

Register the Open Mcp Apps MCP server in PolicyLayer and add a rule for data_update_item: 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 Open Mcp Apps. Nothing to install.

What risk level is data_update_item? +

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

Can I rate-limit data_update_item? +

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

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

data_update_item is provided by the Open Mcp Apps MCP server (@2nd1st/open-mcp-apps). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

KEEP EXPLORING

More on Open Mcp Apps, and thousands of servers like it.

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