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

Annotations already cover the safety profile (readOnlyHint=true, openWorldHint=true). The description adds useful coverage of the response content itself, but nothing about auth needs, rate limits, or failure behavior for an invalid/closed store id. Value-add beyond annotations is modest.

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, front-loaded with the tool's purpose and output contents, followed by related-tool routing. No filler.

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 need not detail return values, yet it summarizes what's returned, which helps selection. For a single-parameter read tool with full annotation coverage, this is close to complete; minor gap is absence of guidance on invalid store ids.

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 coverage is 100% and the single store_id parameter is fully documented in the schema, including its origin ('from /dominos/store-locator'). The description does not add syntax or format detail beyond that, so the 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 verb (Fetch) and resource (one Domino's U.S. store profile) and enumerates the returned content: weekly hours by service method, wait estimates, order availability, contactless status, payment details. It explicitly distinguishes itself from dominos_directory, dominos_nearby, and dominos_store_locator.

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?

Guidance is clear about how to obtain a store_id (use dominos_directory or dominos_nearby to find a store) and when to prefer a sibling (dominos_store_locator for a shorter location summary). It stops short of an explicit 'when not to use this tool' but covers the main alternative.

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