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

Annotations already declare readOnlyHint=true, openWorldHint=false, destructiveHint=false, so the safety profile is covered. The description adds genuinely useful context beyond that: no provider call, no payment, production and real-value activation disabled, and deterministic behavior. What's missing is the return/structure behavior, but the sandbox guarantees are substantive.

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?

The sandbox-only constraint is front-loaded, which is good, but the text repeats "Deterministic" twice and leans on jargon ("interpreter," "machine-readable") that adds little. It is short but not maximally economical.

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 no output schema, the description should carry the burden of explaining what comes back, and it does not. Combined with an undocumented nested request object, an agent lacks enough to construct the call or anticipate the response beyond the sandbox guarantee.

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 0% for a single nested "request" object with additionalProperties {}. The description only hints that a seller-id lives inside the request ("single seller-id public profile"), without documenting the request payload shape, so it only partially compensates for the coverage gap.

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?

The description names the resource (a single seller-id public profile) but the operative verb is obscured by phrasing like "Sandbox interpreter," which doesn't clearly map to an action an agent performs. It also never distinguishes this from the sibling discover_seller_public_profile_v0, so the invoke_ vs discover_ split remains opaque.

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?

"Deterministic sandbox fixture only; no provider call or payment" implicitly constrains when the tool is usable, which is some guidance. However, there is no explicit when-to-use condition or named alternative (e.g., when to prefer discover_seller_public_profile_v0 over this), leaving routing to inference.

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