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

The annotations already declare this as a safe, idempotent, closed-world read, so the description only needs to add what the annotations omit. It does that well: it discloses the accepted identifier formats, the two-part answer (published-by-checked-manufacturer and still-current), and the follow-through of returning the current version for a superseded one. It stops short of describing the full response payload.

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 core claim and the two accepted input forms are front-loaded and efficient. The trailing German sentence is a verbatim translation of the intent and adds little for an agent reading the English, so the text is slightly longer than it needs to be.

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 the response. It sketches two of the answer's elements and the superseded-version behavior, but leaves the actual return shape (fields, statuses, metadata) and the side effect of the language parameter on the response only partially specified.

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 coverage is 100%, with both the SHA-256/URL format and the language enum documented inline, so the baseline is 3. The description restates the '64 hex digits' and '/pdf/…' formats but adds no semantics beyond what the schema already declares.

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 states a specific verb and resource: it checks whether a PDF was published by a checked manufacturer on ProofPass and whether it is still current. The purpose is unambiguous. It does not explicitly distinguish itself from near-neighbours such as get_current_document or list_manufacturer_documents, so it falls short of a 5.

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 tells the agent what input to supply (a SHA-256 checksum or ProofPass PDF URL), which implies the verification use case, and notes that a superseded version returns the current one. However, it never says when to prefer this over looking up the document directly, and it gives no exclusions or preconditions.

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