geo_sun

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

With no annotations, the description must disclose all behaviors. It states times are in UTC, which is helpful. However, it does not mention edge cases like polar regions (no sunrise/sunset), error handling, or the effect of missing date (defaults to today, as per schema). Basic transparency but incomplete.

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?

Two sentences, front-loaded with key functionality, no redundancy. Every word adds value. Ideal length for a simple calculator tool.

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?

The description adequately covers inputs, outputs, and time zone for a tool with no output schema. It could mention edge cases or return format, but is sufficient for typical use. Lacks only minor details.

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 100%, so the schema already documents parameters. The description adds meaning by listing outputs, but does not enrich parameter understanding (e.g., lat/lng bounds or date format). Baseline 3 applies.

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 clearly states the tool calculates sun position data and lists specific outputs (sunrise, sunset, solar noon, civil dawn/dusk, day length). This verb+resource combination is distinct from sibling tools like geo_elevation or geo_timezone, making its purpose unambiguous.

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?

No explicit guidance on when to use this tool versus alternatives. The description lacks conditions, prerequisites, or mentions of when not to use. While siblings are mostly non-overlapping, there is no proactive direction for the agent.

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