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

With no annotations provided, the description carries the behavioral disclosure burden. It goes beyond a generic 'get' by stating the list is unpaginated and often empty or near-empty, and by listing the exact data points returned. It does not cover error cases or rate limits, but for a simple read operation the disclosed pagination and scope traits are meaningful.

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 sentence packs all relevant details without filler or redundancy. It front-loads the core action ('Get the newest companies'), then economically adds the list-size caveat and return fields. 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 tool with one parameter, no output schema, and no annotations, the description is remarkably complete. It tells the agent what will be returned, the expected list size, and the lack of pagination. Nothing needed to call it correctly is missing; the schema handles the only required parameter.

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 baseline is 3. The description does not elaborate on the category_id parameter beyond what the schema already provides (slug or URL). It adds no new semantic meaning for the parameter, so it neither improves nor harms the agent's understanding.

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 uses a specific verb ('Get') and resource ('newest companies added to a Trustpilot category'), and clearly scopes the output to a short unpaginated list. It also enumerates the returned fields (name, domain, TrustScore, review count, location, category size, subcategories), which distinguishes it from sibling tools like trustpilot_category_companies that likely return the full company list.

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 description provides clear context: this tool is for retrieving the newest companies in a category, with an explicit caveat that the list is typically very short (0-10 entries). It does not name alternatives or state exclusions, but the 'newest' qualifier and list-size warning give the agent enough context to select it over broader category tools.

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