Stream Sunrise/Sunset

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

Annotations include openWorldHint=true but do not clarify the streaming behavior. The description uses 'stream' and gives an example but does not explain whether this is a one-time fetch or a persistent connection, nor does it mention side effects, authentication, or rate limits beyond the minimal annotation hints.

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?

The description is very concise (around 30 words) and front-loaded with the purpose. It includes a group label and example, making it efficient. However, it omits important details, so it is not maximally concise while still informative.

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?

Given no output schema, low schema coverage, and a streaming context, the description is insufficient. It does not explain the output format, streaming mechanism, or how to interpret the data. The agent would struggle to use this tool correctly without additional knowledge.

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 coverage is 0%, so the description must compensate. It only provides an example with values but does not explain the meaning, constraints, or format of latitude, longitude, or timezoneOffset. The agent lacks essential semantic information.

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 'Today + tomorrow sun events' with a verb 'stream' and specific resource 'sunrise/sunset'. It includes a group label 'Real-time Streaming' and an example, making the purpose unambiguous and distinguishing it from sibling tools like 'sun_times'.

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 description provides an example and group label but does not explicitly state when to use this tool over alternatives like 'stream_lunar_phase' or 'stream_positions'. Usage is implied through the example and group, but no when-not guidance is given.

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