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

Annotations already declare readOnlyHint=true and openWorldHint=true, and an output schema exists, so the safety-and-return burden is off the description. It adds that these are availability slots for scheduling a pickup (not a booking mutation), but says nothing about validity windows, timezone, or how far ahead slots extend – useful context left out.

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?

A single front-loaded sentence with no filler; the resource is named before the qualifier. Slight awkwardness from the nested quoted gloss '"check-in"' and the em-dash aside, but it is appropriately sized.

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 one-parameter read-only lookup with full schema coverage, existing annotations, and an output schema, the description supplies the resource and its purpose. Missing only minor operational context (time horizon, timezone) that an agent could want, but nothing essential to call it correctly.

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 tells the agent the id is numeric and where to source it (wendys_nearby stores[].store_id, wendys_restaurant store_id). The description repeats 'numeric store id' without adding format or constraint detail, so baseline 3 applies.

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 resource – Wendy's mobile-order arrival/check-in time slots – with the lookup key (numeric store id) and the semantic purpose (when a pickup order can be scheduled). No sibling (wendys_menu, wendys_nutrition, wendys_store) overlaps with this, so an agent can identify it unambiguously.

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 trailing clause 'when a caller can schedule a mobile pickup order' implies the usage context, but there is no explicit when-to-use vs. alternatives guidance (e.g., pair with wendys_store or wendys_store_menu to build an order). Usage is inferable rather than stated.

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