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

The description implies a read-only external lookup and adds the Open-Meteo source, which is useful context. However, the annotations are all false/absent and the description does not disclose units, return format, or side effects, leaving the agent with only a minimal behavioral profile.

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 front-loaded sentence with no wasted words. It is effective as a concise summary but slightly too thin to earn a 5 given the unusual input schema and missing guidance.

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 no output schema and seven parameters, several of which are explicitly discarded, the description should clarify the return value and why only 'city' matters. It provides enough for a basic call but leaves the agent guessing about output format and the role of the other parameters.

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?

All seven parameters have schema descriptions, so the baseline is 3. The tool description only reinforces that 'city' is the primary parameter and does not add format, value, or semantic details beyond the schema.

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 that the tool returns the current temperature for a city and names the data source (Open-Meteo). It identifies the target resource and differentiates the tool from unrelated siblings, though it lacks an explicit verb like 'get'.

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 about when to use this tool instead of related sibling tools, and no exclusions or prerequisites. Mentioning 'Open-Meteo' gives provenance but not selection criteria.

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