service_status

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

No annotations are supplied, so the description carries the full behavioral burden. It conveys that the call is non-committal regarding addresses, but omits whether the call is read-only, whether it depends on region/session state, what the response contains, or how failures are signalled.

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 short sentences, front-loaded with the primary action, with no filler. The only inefficiency is that the second sentence is a caveat rather than positive information about behavior.

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 is simple (one optional parameter, no output schema, no nested objects), so the description doesn't need to be long. Still, it leaves the sole parameter and the meaning of "status" unexplained, which is more than a trivial gap for a storefront-state lookup in an e-commerce toolset.

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 is one optional parameter (country) with 0% schema description coverage, and the description never mentions it. An agent cannot tell whether country changes the storefront evaluated, defaults to the detected region, or can be omitted safely.

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?

"Get homepage storefront status" names a verb and a resource, but "status" is undefined – it could mean availability, store hours, outage state, or region selection. The second sentence narrows scope by negation rather than stating what is actually returned, so an agent can't fully predict the result.

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?

"Does not confirm a specific address" implicitly steers the agent toward suggest_address/delivery_location for address confirmation, which is useful sibling differentiation. However, it never says when this tool should be called instead (e.g., before checkout, to check regional availability), so usage is only implied.

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