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

With no annotations, the description must fully disclose behavior. It mentions live data source and some return fields, but does not discuss rate limits, caching, geographic restrictions (Slovenia only), error conditions, or required permissions. Under-specified for a live data tool.

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 concise sentences that front-load the core functionality and data source. However, could be slightly more structured (e.g., separated output fields from data source) without adding length.

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, the description partially covers return fields but omits error handling, pagination behavior, or station selection details. Adequate for a simple weather tool, but not exhaustive.

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 each parameter has a description. The tool's description does not add explanatory value beyond what the schema already provides, maintaining baseline score.

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?

Clearly states the tool provides current weather observation from the nearest ARSO station to given coordinates, listing returned fields (temperature, humidity, etc.). The name 'slovenia-weather' and description imply geographic scope, which helps distinguish it from siblings like 'hikes-trails' or generic geo tools, but lacks an explicit verb-action statement.

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 on when to use this tool versus alternatives (e.g., other Slovenia tools or generic weather sources). Does not specify prerequisites, coordinate bounds, or situations where it might fail.

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