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

Annotations already declare readOnlyHint, idempotentHint, openWorldHint, and non-destructive behavior, so the safety profile is covered. The description adds the GET method, cost, and output topics, which is useful context, but it does not disclose pagination, data freshness, or rate-limit behavior; these are minor given the annotation coverage.

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?

One dense, front-loaded sentence containing the method, path, price, and the three returned data components. Every phrase earns its place and there is no filler.

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 helpfully names what the response covers and even defines the recurrence metric's units. It omits possible time-range/freshness caveats and response-shape details, but for a focused read-only profile tool the definition is largely complete.

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%, and the schema already documents id, client_key, and payment_token meaningfully. The description only restates 'by id' and describes output fields, so it does not materially improve parameter understanding beyond the schema.

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 the exact endpoint, HTTP method, price, and the specific resource: a buyer profile by id. It names the three concrete outputs — award history, supplier concentration, and per-CPV-division recurrence — which clearly differentiates it from sibling company-focused tools like get_company and get_company_awards.

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?

No when-to-use guidance, prerequisites, or comparisons to alternatives are provided. An agent is left to infer when buyer history is the right tool versus a company-level tool, and no exclusion conditions are stated.

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