get_sky_timeline

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

With no annotations provided, the description carries the behavioral burden. It says it 'samples' positions through a window, implying a read-only computation, which is fine. But it doesn't disclose interval granularity behavior, output format, or how it handles invalid/out-of-range dates. It's a safe read but missing behavioral detail.

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

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

A single efficient sentence gets straight to what the tool does and a pointed real-world use case. No filler words. It could add a bit more but remains appropriately compact.

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

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

For a 5-parameter tool with zero schema coverage, no output schema, and no annotations, the description is thin. It explains the core purpose and one use case but leaves parameter semantics and behavior largely undeclared. The existence of sibling tools like get_astronomy makes completeness more important for disambiguation.

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

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

Schema description coverage is 0%, so all 5 parameters (latitude, longitude, start, end, intervalMinutes) are undocumented. The description mentions 'shoot window' (maps to start/end) but adds nothing about latitude/longitude or the optional intervalMinutes, which has meaningful semantics (sampling frequency). It compensates modestly but misses several parameters.

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

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

The description uses a specific verb ('Sample') plus a clear resource ('sun/moon positions through a shoot window'), and it names concrete use cases (moon alignment, Milky Way darkness planning). It's clear, though sibling get_astronomy exists and the description doesn't explicitly carve out its distinct scope from that tool.

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

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

The use cases (moon alignment, Milky Way darkness) imply when to use it, and 'shoot window' gives useful context for the start/end parameters. However, there's no explicit guidance on when NOT to use it versus get_astronomy or assess_dark_sky, which are plausible overlapping siblings.

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