Check the site is reachable

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

Annotations already declare readOnlyHint, openWorldHint, and idempotentHint, and the description adds meaningful behavioral context by specifying what is verified (RSC payload parseability) and what is reported (site and school id). No contradiction exists.

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 three short sentences with no filler. It front-loads the primary purpose, then states the reported information, and ends with the safety-relevant 'Read-only' note.

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 simple, parameterless healthcheck with read-only annotations, the description is largely complete: it states what is checked and what is reported. The absence of an output schema is partially mitigated by the mention of reported fields, though the exact representation of the reachability result is left implied.

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?

There are zero parameters, so the input schema carries no burden. The description appropriately avoids inventing parameter details, and the baseline for a zero-parameter tool is met.

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 identifies the action ('Verify'), the resource (the athletics site), and the success criterion (reachable and serving a parseable RSC payload). It also notes what the tool reports, distinguishing it from sibling data-retrieval tools.

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 gives a clear context for use: checking whether the site is reachable and confirming the configured site/school id. It does not explicitly mention alternatives or when-not-to-use, but the sibling tools are all data operations, so the healthcheck purpose is unambiguous.

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