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space.skywatch

Get a live almanac for your location: sun, moon phase, visible planets, near-Earth asteroid approaches, and ISS position and visibility. One call, three sources.

Instructions

Synthesis — what is notable in YOUR sky right now (lat/lon): the live almanac (sun, moon phase, planets above your horizon), near-Earth asteroid close approaches this week, and the ISS (position + whether it is above your horizon now). One call, three sources, per-section found/error.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
latYes
lonYes
altitudeMNo
Behavior3/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

With no annotations, the description carries the full burden. It discloses per-section found/error behavior and mentions three sources, but lacks details on safety, rate limits, or authentication. Adequate but not thorough.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness5/5

Is the description appropriately sized, front-loaded, and free of redundancy?

Concise three-sentence description, front-loaded with 'Synthesis', no wasted words.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness4/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

Given complexity and no output schema, description lists three sources and mentions per-section found/error, providing sufficient context for a synthesis tool. Lacks return format details but acceptable.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters3/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema coverage is 0%, so description must compensate. It explains lat/lon for location but omits altitude. Adds some value over schema but incomplete.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose5/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description clearly states the tool synthesizes multiple sky data sources (almanac, asteroid approaches, ISS position) for a given location, distinguishing it from specialized sibling tools like space.close-approaches or space.sky-tonight.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines4/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

The description implies usage when a combined sky overview is needed, contrasting with individual tools. It provides clear context but does not explicitly state when not to use or list alternatives.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

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