space.observe
Where is an asteroid/comet in the sky and can you see it? Propagates JPL orbital elements (validated vs Horizons to <0.1 arcmin) to give geocentric RA/Dec, constellation, distance, phase angle, and apparent magnitude. With observer lat/lon: altitude/azimuth, visible-now flag, and the best dark-sk...
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What space.observe does on Mcp
AI agents call space.observe to retrieve information from Mcp without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
Why space.observe is rated Low
This tool retrieves and calculates astronomical observation data based on input parameters. It has no side effects—no data is created, modified, deleted, or transacted. The output is purely informational for astronomy purposes. Even though it is pay-per-call (settled in USDC), the tool itself performs only read operations; payment is handled separately by the server infrastructure, not by this tool's logic.
From the tool's definition Tool performs observational queries only: 'gives geocentric RA/Dec, constellation, distance, phase angle, and apparent magnitude' and 'visible-now flag' and 'best dark-sky viewing window'. No modification, deletion, execution, or financial transaction occurs.
Attacks that exploit this kind of access
The rule that runs space.observe safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Mcp, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For space.observe, this is the rule to start with:
space.observe is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.
The button opens the PolicyLayer dashboard: create your workspace, connect Mcp, apply this rule, and every space.observe call is checked against it from then on.
Questions about space.observe
Where is an asteroid/comet in the sky and can you see it? Propagates JPL orbital elements (validated vs Horizons to <0.1 arcmin) to give geocentric RA/Dec, constellation, distance, phase angle, and apparent magnitude. With observer lat/lon: altitude/azimuth, visible-now flag, and the best dark-sky viewing window in the next 24h. 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.observe: 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.observe 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.observe 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.observe. 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.observe 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.
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