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

Annotations already declare readOnly=false, idempotent=true, destructive=false; the description adds the commitment semantics (exact terms hash binding, explicit acceptance flag) and clarifies scope by pushing payment links and verified payment state to inspect_offer. It does not say what happens on a hash mismatch or whether the resulting order can be cancelled, which are the remaining behavioral gaps.

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?

Three tight sentences, front-loaded with the commitment action and its preconditions before the follow-up pointer. "Follow inspect_offer later" is slightly awkward phrasing but carries 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 no output schema and seven parameters, the description covers the commit decision and the post-acceptance path well, but leaves unanswered what success returns (order id? receipt?), how hash mismatch is reported, and the semantics of three optional fields. Adequate for the happy path, incomplete around failure and identity handling.

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 only 29%, so the description must compensate, and it does add meaning for the two highest-stakes parameters (terms_sha256 as the exact inspected-terms hash, accept as an explicit acceptance flag). However, name, organization, and purchase_order are undocumented in both schema and description, leaving the agent to guess buyer-identity and PO-field conventions.

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 concrete verb and outcome ("Place an order") rather than restating the name, and frames it against the offer lifecycle ("terms you have inspected"). It is distinguishable from decline_offer/counter_offer, but the link to the specific offer being accepted is only implied through the required id/hash.

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 real preconditions: terms must already have been inspected and the buyer must have authorized acceptance, which is exactly the decision gate an agent needs. It routes to inspect_offer for payment follow-up, but never states when not to use this tool (e.g., instead counter_offer or decline_offer when terms are unacceptable).

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