record_state_diff

Record a before/after state change on an entity. Tracks what changed, which fields, and why.

SERVERNodebench SOURCEnodebench-mcp

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/io-github-homenshum-nodebench/record-state-diff.md

WHAT IT DOES

What record_state_diff does on Nodebench

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

RISK

Why record_state_diff is rated Medium

The tool records/writes state diff data (before/after changes) to some data store. It creates or modifies audit/tracking records, which is a reversible write operation. It does not execute code, delete data, or involve financial transactions. Severity is medium because misuse could corrupt audit trails or inject false state history.

From the tool's definition Record a before/after state change on an entity. Tracks what changed, which fields, and why.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs record_state_diff safely

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

record_state_diff Rate-limited

record_state_diff 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": {
    "record_state_diff": {
      "limits": [
        {
          "counter": "record_state_diff_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 Nodebench, apply this rule, and every record_state_diff call is checked against it from then on.

FAQ

Questions about record_state_diff

What does the record_state_diff tool do? +

Record a before/after state change on an entity. Tracks what changed, which fields, and why. It is categorised as a Write tool in the Nodebench MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on record_state_diff? +

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

What risk level is record_state_diff? +

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

Can I rate-limit record_state_diff? +

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

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

record_state_diff is provided by the Nodebench MCP server (nodebench-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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