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

Annotations already declare readOnlyHint=true and openWorldHint=true, so the safety profile is covered. The description adds that this is a single-entity detail fetch and lists the returned facets, but says nothing about behavior on an invalid/unknown store_id, data freshness, or regional availability. Useful but modest added context given annotations carry the safety load.

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 sentences, no filler. The core purpose and field inventory come first, and the input-provenance constraint is tacked on afterward where it belongs.

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?

With an output schema present the description needn't explain return values, and the single required parameter is fully documented in the schema. Annotations cover read-only and open-world behavior. The only minor gap is absence of any error/edge-case guidance, which is non-blocking.

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 description coverage is 100%, and the schema already documents store_id as 'zapi.zaxbys.com's own numeric store id, from a /zaxbys/nearby result's store_id.' The description's provenance note largely repeats this, so the baseline 3 for fully-covered schema is appropriate.

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?

States a specific verb-and-resource pair ('One Zaxby's store's full detail by its store id') and then enumerates exactly what the detail contains: address, phone, coordinates, open status, per-channel hours, fulfillment/amenity flags. This is clearly distinguishable from the sibling zaxbys_nearby (search) and zaxbys_menu without opening either schema.

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?

Gives an explicit prerequisite/source: 'store_id comes from a zaxbys_nearby result,' which tells the agent it must call the nearby tool first. It does not state when-not to use this tool or name an alternative for other lookup shapes, so it falls short of a full 5.

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