get_coverage

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

With no annotations, the description fully covers the behavior: a read-only operation to get coverage counts. It is clear and has no hidden side effects or disclaimers. Could mention if the data is real-time or cached, but not required for simplicity.

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?

One concise sentence with no wasted words. The key information is front-loaded and clear.

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 tool has no parameters and an output schema, so the description is complete for its low complexity. It adequately informs the agent of the tool's purpose and return value.

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?

No parameters exist, so the description naturally adds meaning beyond the empty schema. It explains what the tool returns, fulfilling the role for parameter-less tools.

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 uses a specific verb 'Get' and clearly states the resource 'Pawgo's data coverage' and what it provides: counts of airlines and countries. It is distinct from sibling tools like 'check_airline_policy' which focus on specific items.

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 implies usage for retrieving overall coverage statistics but does not explicitly state when to use it versus alternatives or when not to use it. Given siblings, more guidance would help.

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