Returns the live CDN state for a public blob URL (probed once from gateway-us-east-1 — NOT a global view). Use this when a deployed asset shows the wrong version or you suspect cache staleness. The result includes
AI agents call diagnose_public_url to retrieve information from Run402 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 inspection of the state of a publicly accessible CDN endpoint. It gathers information about cache staleness and asset versions but does not modify, execute, or delete anything. The blast radius of misuse is minimal—an agent could only learn about the wrong CDN state or burn API quota on repeated probes, which is a low-severity risk.
From the tool's definition Returns the live CDN state for a public blob URL' — the tool retrieves and queries CDN cache metadata with 'no side effects'.
Attacks that exploit this kind of access
Returns the live CDN state for a public blob URL (probed once from gateway-us-east-1 — NOT a global view). Use this when a deployed asset shows the wrong version or you suspect cache staleness. The result includes. It is categorised as a Read tool in the Run402 MCP Server, which means it retrieves data without modifying state.
Register the Run402 MCP server in PolicyLayer and add a rule for diagnose_public_url: 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 Run402. Nothing to install.
diagnose_public_url 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 diagnose_public_url 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 diagnose_public_url. 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.
diagnose_public_url is provided by the Run402 MCP server (kychee-com/run402). 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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