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

Annotations already declare readOnly, idempotent, non-destructive and closed-world, so the safety profile is covered. The description adds real value beyond them: it confirms no state change occurs, that only 'confirmed' recipients are shown, and that the tool returns a dashboard link where the actual send happens — which reframes expected output in a way annotations cannot.

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 sentences, no filler, with the core behavior (who would receive what) front-loaded and the no-side-effects caveat immediately after. Every clause carries information an agent needs.

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?

With no output schema, the description does the necessary work by saying the result contains the confirmed recipients, the documents, and a dashboard link. For a two-parameter read tool that is close to sufficient, though it leaves the shape of the returned data and the treatment of unconfirmed recipients unspecified.

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 100%, so the schema already explains both product_id (including where to get it from list_my_products) and the language enum, and the baseline applies. The description contributes nothing about either parameter — notably it never mentions that the answer can be localized despite language being an enum parameter.

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?

States a specific verb and resource: shows who would receive a product's current documents, naming both the recipients on the distribution list and the documents themselves. It is distinguishable from list_recipients and get_current_document by the 'would receive' framing, but it never explicitly names a sibling it is not, so differentiation is inferred rather than stated.

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?

The clause 'It sends nothing and records nothing; sending is done with a button in the dashboard' makes the preview-versus-send boundary explicit, which is the key usage decision for this tool. It does not point to any other tool as an alternative, but within a preview-only scope the guidance is clear enough to select correctly.

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