Observer-local sky almanac for a lat/lon + time (computed, no upstream): sun & moon rise/set + current alt/az, moon phase + illumination + next quarter, and all 7 naked-eye planets (alt/az, RA/dec, magnitude, above-horizon). Stargazing, astrophotography.
AI agents call space.sky-tonight to retrieve information from Mcp without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool purely computes and returns astronomical data (sky positions, rise/set times, moon phase, planet data) for a given location and time. It is entirely read/query in nature with no side effects. The only note is that it is pay-per-call (USDC), but the tool itself does not move money — the payment is handled by the x402 infrastructure of the server, not the tool's action.
From the tool's definition Observer-local sky almanac for a lat/lon + time (computed, no upstream): sun & moon rise/set + current alt/az, moon phase + illumination + next quarter, and all 7 naked-eye planets
Attacks that exploit this kind of access
Observer-local sky almanac for a lat/lon + time (computed, no upstream): sun & moon rise/set + current alt/az, moon phase + illumination + next quarter, and all 7 naked-eye planets (alt/az, RA/dec, magnitude, above-horizon). Stargazing, astrophotography. It is categorised as a Read tool in the Mcp MCP Server, which means it retrieves data without modifying state.
Register the MCP server in PolicyLayer and add a rule for space.sky-tonight: 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 Mcp. Nothing to install.
space.sky-tonight 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 space.sky-tonight 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 space.sky-tonight. 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.
space.sky-tonight is provided by the MCP server (@2sio/mcp). 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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