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 what data is exposed (per-channel hours, delivery deep links), which is useful, but says nothing about auth, rate limits, or upstream dependency beyond what the schema states.

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?

One front-loaded sentence naming the resource first, then the payload. No filler, though the trailing field list is dense and could be trimmed since an output schema exists.

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?

An output schema exists, so return values needn't be spelled out; the path-sourcing prerequisite is covered in the schema. Combined with annotations covering safety, an agent has enough to call this correctly, though cross-referencing the sitemap sibling could be more explicit.

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 'path' parameter is fully documented in the schema, including its origin from the sitemap. The description adds no additional parameter meaning, so the baseline of 3 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 resource ('Sonic Drive-In restaurant detail') and enumerates the fields returned (address, phone, coordinates, hours, amenities, delivery links), which distinguishes it from siblings like sonic_locations or sonic_directory. It does not name a sibling explicitly, but the 'detail' vs 'list/neary/directory' distinction is inferable.

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?

No explicit when-to-use guidance or named alternatives. The only routing hint comes indirectly through the parameter description ('path from GET /sonic/sitemap'), which implies the sitemap is the upstream step, but the description itself offers no usage conditions.

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