extract_trial_evidence

Extract trial, study, or lab evidence snippets from source text.

SERVERNodebench SOURCEnodebench-mcp

Low RISK CLASS

Category Read

Parameters 00 required

Recommended Allowedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/io-github-homenshum-nodebench/extract-trial-evidence.md

WHAT IT DOES

What extract_trial_evidence does on Nodebench

AI agents call extract_trial_evidence to retrieve information from Nodebench without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

RISK

Why extract_trial_evidence is rated Low

The tool performs text extraction and parsing on provided source material. This is a passive read operation that retrieves and formats existing data without altering it, executing code, or triggering external actions. Confidence is high because the description is clear and unambiguous about its read-only nature.

From the tool's definition Tool name and description indicate 'extract' and 'snippets from source text' — a retrieval/parsing operation with no modification or side effects. No mention of deletion, execution, creation, or financial operations.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs extract_trial_evidence 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 extract_trial_evidence, this is the rule to start with:

extract_trial_evidence Allowed

extract_trial_evidence is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "extract_trial_evidence": {}
  }
}

ALLOW ONLY THIS TOOL → Instant setup, no code required.

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

FAQ

Questions about extract_trial_evidence

What does the extract_trial_evidence tool do? +

Extract trial, study, or lab evidence snippets from source text. It is categorised as a Read tool in the Nodebench MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on extract_trial_evidence? +

Register the Nodebench MCP server in PolicyLayer and add a rule for extract_trial_evidence: 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 extract_trial_evidence? +

extract_trial_evidence is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit extract_trial_evidence? +

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

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

extract_trial_evidence 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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