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

With no annotations, the description carries the full burden, but it only mentions the provider and output value. It does not disclose that this appears to be an external network call, what happens to inputs, or any side effects or requirements. The schema's repeated 'discarded after...' notes make the behavior even less clear relative to the geo-hint purpose.

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 single sentence is tight and front-loaded, with no filler. However, for a 9-parameter tool with no output schema and no annotations, this brevity veers into under-specification rather than effective concision.

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 definition is inadequate for correct invocation. It does not identify the relevant parameter, the expected return format for latitude and longitude, or the role of the other eight schema fields. No annotations or output schema compensate for this absence.

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 100%, so the baseline is 3, but the description adds no parameter mapping and the schema descriptions are misaligned: 'city' is described as a 'public weather hint' and most parameters are 'discarded after' checks, while the description promises latitude/longitude for a place. An agent cannot tell which of the 9 parameters is the place input.

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 is clear at a glance: the tool provides latitude and longitude for a place, presumably via Open-Meteo geocoding. It lacks an explicit verb but the resource and provider are identifiable. It does not differentiate from siblings such as weather-hint, and it doesn't map 'a place' to any obvious input parameter.

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?

There is no guidance on when to choose geo-hint over sibling tools, when not to use it, or what inputs qualify as a place. The only context is the provider name, which is not enough to route an agent correctly.

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