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

Annotations already declare readOnlyHint=true, so the safety profile is covered structurally. The description adds modest value by naming the fields returned (status, totals, validity, client), which is useful since no output schema exists, but it says nothing about error cases or whether a missing id fails.

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 compact sentence with the resource and returned fields front-loaded; no filler, no redundancy. Every clause earns its place.

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, single-parameter tool with annotations covering safety, the definition is nearly sufficient, and the field list partly compensates for the absent output schema. It would be complete with a pointer to the sibling list tool for obtaining the id.

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?

Only one parameter and schema description coverage is 100%, so the schema already documents the id fully, including its provenance ('from billomat_list_offers'). The description adds no syntax or format detail beyond the schema; baseline 3 applies.

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 (get) and resource (one offer), and the parenthetical enumerates the payload (status, totals, validity, client). The singular 'one offer' implicitly contrasts with the sibling billomat_list_offers, though it never names it.

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?

Usage is only implied: fetch a single offer rather than enumerate them. There is no explicit statement of when to prefer this over billomat_list_offers, nor any prerequisite such as where the id comes from (that hint lives in the schema, not the description).

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