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

There are no annotations, so the description must carry behavioral disclosure, and it does not. 'List' implies a read-only retrieval of multiple items, but the description omits data source, result limits, pagination, ordering, and cost. The empty '[COST: ]' placeholder indicates an intended but unspecified behavioral constraint.

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 core phrase 'List US universities' is appropriately brief and front-loaded. However, the descriptive text opens with an empty '[COST: ]' placeholder that carries no information and could confuse an agent. Overall, it is concise but slightly under-specified.

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?

For a zero-argument list tool with an output schema, the description is mostly sufficient for correct invocation. It does not, however, mention cost, data source, or any limitations, and the empty cost placeholder highlights a missing context. This is adequate but not complete.

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?

The tool has zero parameters, so the description is not required to explain parameter semantics. The empty input schema fully covers the parameter surface. Baseline 4 applies for parameterless 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 the specific verb 'List' to define the operation and names the exact resource ('US universities'). It also distinguishes this tool from all sibling tools, none of which target universities. Nothing is vague or misleading about what it does.

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 explicit guidance is given about when to use this tool or when to prefer a sibling. The intended use is only implied by the description: choose it when a list of US universities is needed. It does not mention prerequisites, exclusions, or alternative tools.

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