record_event
Record a typed event to the causal event ledger. Supports causal linking via causedByEventId and correlation grouping via correlationId.
This record as markdown: /tools/io-github-homenshum-nodebench/record-event.md
What record_event does on Nodebench
AI agents use record_event 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.
Why record_event is rated Medium
This tool writes/creates data (event records) to a ledger. It is reversible in principle (records can typically be deleted), making it a Write rather than Destructive. Severity is medium because injecting false or misleading causal events could corrupt audit trails or decision logic downstream.
From the tool's definition "Record a typed event to the causal event ledger" — creates a new event entry with causal linking and correlation grouping
Attacks that exploit this kind of access
The rule that runs record_event 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_event, this is the rule to start with:
record_event 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.
The button opens the PolicyLayer dashboard: create your workspace, connect Nodebench, apply this rule, and every record_event call is checked against it from then on.
Questions about record_event
Record a typed event to the causal event ledger. Supports causal linking via causedByEventId and correlation grouping via correlationId. 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.
Register the Nodebench MCP server in PolicyLayer and add a rule for record_event: 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.
record_event is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.
Yes. Add a rate_limit block to the record_event 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.
Set action: deny in the PolicyLayer policy for record_event. 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.
record_event 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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