AI agents call get-randomness-latest to retrieve information from Drand without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool performs a read-only query against the drand network to fetch the most recent beacon value. There are no side effects, no data modification, and no irreversible actions. The randomness output is non-sensitive (drand produces public verifiable randomness by design), making misuse unlikely to cause harm. It aligns cleanly with the Read category.
From the tool's definition Tool retrieves the 'latest random value from drand quicknet' with no mention of modification, deletion, or execution of external operations. This is a data retrieval operation.
Attacks that exploit this kind of access
Get the latest random value from drand quicknet. It is categorised as a Read tool in the Drand MCP Server, which means it retrieves data without modifying state.
Register the Drand MCP server in PolicyLayer and add a rule for get-randomness-latest: 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 Drand. Nothing to install.
get-randomness-latest 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 get-randomness-latest 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 get-randomness-latest. 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.
get-randomness-latest is provided by the Drand MCP server (randa-mu/drand-mcp-server). 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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