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

Annotations already declare readOnlyHint=true, idempotentHint=true, destructiveHint=false, and openWorldHint=false, so the safety/behavior profile is covered. The description adds value beyond that by disclosing an auth requirement ('Needs your key') and an output characteristic ('one sentence for your principal in English and German'), though the phrasing is muddled.

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?

A single dense, comma-spliced sentence that is difficult to parse and not front-loaded. The core action is buried among parenthetical asides about signatures and delivery timing.

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 read-only retrieval tool with no output schema and a bare one-parameter input, the description should clearly explain what is returned and what order_id identifies. It only partially addresses output ('one sentence ... in English and German') amid unclear phrasing, leaving an agent without enough to call it confidently.

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% for the single order_id parameter, so the description must carry the burden of explaining it. It never clarifies what order_id should be or its format; the only reference is the vague pronoun 'this', leaving the sole parameter effectively undocumented.

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 gestures at retrieving the buyer's stated motive for an order ('why did you buy this?'), but it is a run-on jumble of clauses about signatures, receipts, and output language rather than a clean statement of the action. It never clearly distinguishes this from siblings like get_order, verify_receipt, or recall, which also touch order/receipt data.

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 explicit when-to-use or when-not-to-use guidance, and no sibling alternatives are named. The only implicit cue is 'Buyer: why did you buy this?', which hints at a buyer-facing context but leaves the trigger conditions for an agent to guess.

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