AI agents call draft_diff to retrieve information from Novyx without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves and displays information about changes in a draft without modifying, deleting, or executing any actions. It is analogous to a 'git diff' or version comparison operation, which are inherently read-only. The blast radius of misuse is minimal—an agent could only view draft differences, not alter or execute them.
From the tool's definition The tool 'draft_diff' is described as showing 'a field-level diff for a memory draft.' The verb 'show' and the operation of displaying differences between draft states are read-only operations with no side effects on data.
Documented attack patterns abuse exactly the kind of access draft_diff gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Novyx, and nothing reaches the server without passing your rules. This is the rule we recommend for draft_diff:
{
"version": "1",
"default": "deny",
"tools": {
"draft_diff": {}
}
}draft_diff is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Show a field-level diff for a memory draft. It is categorised as a Read tool in the Novyx MCP Server, which means it retrieves data without modifying state.
Register the Novyx MCP server in PolicyLayer and add a rule for draft_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 Novyx. Nothing to install.
draft_diff is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the draft_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.
Set action: deny in the PolicyLayer policy for draft_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.
draft_diff is provided by the Novyx MCP server (novyxlabs/novyx-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 120 Novyx tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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120 Novyx tools catalogued and risk-classified — across an index of 42,500+ MCP servers.