Generate a random UUIDv4.
AI agents call uuid to retrieve information from Nexus Core without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
UUID generation is a read-like operation that retrieves/produces data without creating, modifying, deleting, or executing anything. While technically it generates rather than retrieves, it is a stateless utility that produces no side effects on system state or external resources. Severity is low because misuse has no meaningful security impact—an attacker cannot cause damage through UUID generation alone.
From the tool's definition Tool generates a random UUIDv4 with no side effects, no data modification, no external operations triggered. Pure deterministic output generation.
Attacks that exploit this kind of access
Generate a random UUIDv4. It is categorised as a Read tool in the Nexus Core MCP Server, which means it retrieves data without modifying state.
Register the Nexus Core MCP server in PolicyLayer and add a rule for uuid: 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 Nexus Core. Nothing to install.
uuid 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 uuid 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 uuid. 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.
uuid is provided by the Nexus Core MCP server (noumenon-ai/nexus-core). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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