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 the non-obvious auth and plan-gating requirement and notes the data equals the public page view. It does not cover failure behavior for an unknown or stale slug, which would be the remaining useful detail.

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?

Purpose is front-loaded in the first clause, and the trailing data enumeration helps an agent judge relevance before calling. The middle catalogue of fields is dense but each item earns its place by signalling returned data, given no output schema exists.

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 fully compensates by listing the returned data categories, and it covers the single parameter's origin plus auth/plan prerequisites. Nothing an agent needs in order to invoke this correctly is missing.

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 0% and there is a single undocumented parameter, so the description carries the burden — it explains what the slug identifies and where to obtain it (search_entities, buyer results), which is the key operational fact. Length/concrete format of the slug is left to the schema's minLength/maxLength only.

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 resource (one contractor profile) and the identifier (slug), and enumerates the payload categories: registry data, wins/offers, buyers, rivals, recent contracts. Naming the slug source (search_entities or a buyer's results) also disambiguates it from sibling lookups like get_buyer and search_entities, so an agent can route without opening the schema.

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?

Gives concrete preconditions (OAuth authentication plus a trial or paid plan) and tells the agent where the required slug comes from, which is real when-to-use guidance. It does not name an explicit alternative or exclusion case (e.g. when to prefer get_buyer or get_company_profile), so it stops short of a 5.

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