Seller mark delivered

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

The description discloses side effects beyond the annotations: it notifies the buyer (who can dispute) and notes that orders auto-mark after 10 days. It also clarifies that no carrier confirmation is wired, which is not implied by the annotations. This adds meaningful behavioral context without contradicting the idempotentHint.

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 description is three sentences with zero redundancy. It front-loads the core action, then provides constraints and side effects, all essential. No filler or extraneous detail.

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?

For a single-parameter tool with rich annotations, the description covers the purpose, valid state transition, side effects, and platform auto-behavior. Since there is no output schema and the parameter is fully described in the schema, nothing critical is missing.

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?

The input schema covers 100% of the single parameter with a clear description ('UUID of the shipped order to declare delivered. Already-delivered is a no-op success.'). The main description repeats the no-op aspect but does not add new semantic meaning beyond the schema, so a 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?

The description clearly states the verb 'Declare' and the resource 'shipped order' with the action 'as delivered', and specifies it has no carrier confirmation. It is distinct from siblings like seller_mark_shipped and seller_attach_tracking, which have different purposes.

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?

It provides an explicit precondition ('Only valid from shipped') and explains the no-op behavior on already-delivered orders. It also mentions the 10-day auto-mark, giving clear context for when to call. It does not name alternative tools, but there is no obvious sibling for this exact action, so the guidance is adequate.

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