update_purchase_status

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

Annotations already declare this is a non-readonly, non-destructive, closed-world mutation, so safety is covered. The description does add meaningful nuance that the recorded status is user-asserted rather than merchant-verified, but it omits side effects, idempotency, and whether recording e.g. 'returned' or 'refunded' triggers downstream activity.

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 short, front-loaded sentences with no filler; the caveat follows the action statement. It is efficient, though the brevity edges toward under-specification rather than true conciseness.

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 need not be described, and annotations cover the safety profile. Still, for a mutation exposed alongside update_purchase and warranty/return siblings, the description omits state-transition rules and cross-tool relationships an agent needs 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 0%, so the description must compensate for parameter meaning, and it says nothing about either purchase_id or status. The enum values in the schema are somewhat self-documenting, but no transitions or valid-status semantics are explained anywhere.

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 verb+resource pair is inferable from the name and the description's 'Record a user-reported status', and the 'user-reported' qualifier hints at trust level. However, the description never states it modifies a purchase record nor distinguishes itself from the sibling 'update_purchase', leaving an agent to infer scope from the tool name alone.

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?

There is no when-to-use guidance, no prerequisites, and no mention of the closely related siblings (update_purchase, generate_return_request, get_warranty_status). The caveat 'This does not confirm any merchant approval' is a scoping remark, not routing guidance.

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