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

Annotations already declare readOnly, idempotent, closed-world and non-destructive, so the safety profile is covered. The description does add two pieces of genuine context beyond that: the auth requirement ("Needs your key") and an attempt to enumerate the returned material (signed motive, signature checks, receipt naming, goal, bilingual sentence). However, the phrasing is so opaque that the added value is partial.

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 long, ungrammatical sentence with nested clauses and ambiguous punctuation; the key fact (what it returns, that a key is required) is buried rather than front-loaded. Length is not excessive, but structure actively impedes parsing.

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?

There is no output schema, so the description carries the burden of explaining return values — it tries (signature, receipt, goal, bilingual sentence) but does so in a way an agent cannot reliably act on. For a read tool with no output schema, the caller cannot predict the response shape with confidence.

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?

With one parameter at 100% schema coverage, the schema already documents order_id with an example format, so the baseline of 3 applies. The description adds nothing about the order_id itself and does not even clearly reference it.

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 a purchase ("the reason you gave with because on buy"), but it is phrased as a garbled run-on that never states a clean verb+resource. The trailing clause about "one sentence for your principal in English and German" muddies whether this fetches, verifies, or generates content, and nothing distinguishes it from siblings like get_order or why_stats.

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 only an implicit link to the buy flow ("the reason you gave with because on buy"); no explicit when-to-use, when-not-to-use, or named alternative such as get_order or why_stats. An agent must infer the trigger condition entirely.

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