AI agents call get_random_apod to retrieve information from Nasa without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool queries and retrieves random astronomy picture entries from NASA's public API. It has no side effects, does not modify state, and does not execute arbitrary operations. It is a pure data retrieval function, making it a Read category risk. Severity is low because the tool only accesses public astronomy data with no destructive, financial, or operational impact.
From the tool's definition Tool name 'get_random_apod' and description 'Get random APOD entries' indicate a retrieval operation. APOD (Astronomy Picture of the Day) is a read-only query that returns existing data without modification, creation, or deletion.
Documented attack patterns abuse exactly the kind of access get_random_apod gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Nasa, and nothing reaches the server without passing your rules. This is the rule we recommend for get_random_apod:
{
"version": "1",
"default": "deny",
"tools": {
"get_random_apod": {}
}
}get_random_apod is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Get random APOD entries. It is categorised as a Read tool in the Nasa MCP Server, which means it retrieves data without modifying state.
Register the Nasa MCP server in PolicyLayer and add a rule for get_random_apod: 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 Nasa. Nothing to install.
get_random_apod 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_random_apod 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_random_apod. 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_random_apod is provided by the Nasa MCP server (jezweb/nasa-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Nasa, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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11 Nasa tools catalogued and risk-classified — across an index of 43,000+ MCP servers.