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

There are no annotations, so the description carries the full burden of disclosing behavioral traits. It only says 'Latitude and longitude for a place via Open-Meteo', without mentioning whether it makes network calls, whether inputs are discarded (even though parameter descriptions hint at discarding), what side effects occur, or any rate limits. The description does not even acknowledge that most parameters are discarded, which is a significant behavioral gap.

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 a single sentence, which is concise, but it is under-specified rather than efficient. It lacks essential details about inputs and outputs. Being short is not valuable if it omits required information; this is an example of under-specification, not conciseness.

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?

With nine optional parameters, no output schema, and no annotations, the description is drastically incomplete. It does not state which parameter to use for the place, how the result is returned (JSON format, error handling), or any constraints. An agent cannot reliably call this tool based on the provided information.

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 baseline is 3, but the description adds no meaning beyond the schema. More importantly, the schema descriptions themselves are inconsistent with the stated purpose: 'City name for a public weather hint; discarded after the call' suggests weather, not geocoding, and other parameters like 'json' or 'ref' have no apparent link to returning coordinates. The description fails to clarify which parameter is the 'place' or how the tool uses the others, so it does not add value beyond the schema and even introduces confusion.

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 states a clear action (return latitude and longitude) and resource (a place via Open-Meteo), but it does not specify which of the nine parameters identifies that place. The parameters are heterogeneous (ref, url, city, feed, host, json, path, zone, query), and only 'city' seems potentially relevant, yet its schema description says 'discarded after the call' and mentions a 'weather hint', not geocoding. This leaves the agent unsure what input to provide for the geocoding purpose.

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 guidance is given on when to use this tool versus alternatives. Sibling tools like weather-hint, timezone, and various shape-check tools exist, but the description does not contrast geo-hint with them or state any preconditions. An agent has no way to know if this is the right tool for a given task.

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