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

Annotations already declare readOnly, idempotent, non-destructive, and closed-world behavior, so safety is covered. The description adds real value by enumerating the per-item fields returned (URL, category, surfaces) and the surface vocabulary, but says nothing about pagination, result size, or ordering for a full-catalog listing.

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 dense sentence front-loads the action and resource, then lists contents and the filter option with zero filler. Nothing is repeated and no sentence is wasted.

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 compensates by naming the fields each product entry returns, which is the key information an agent needs. It falls short only on scale details such as whether the full list is paginated, which matters for a catalog-wide listing.

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 both parameters carry inline descriptions plus an enum for the surface values. The description's "filter by category or by a surface" merely restates the schema without adding format, default, or combination semantics, so the baseline of 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?

The description uses a specific verb and resource ("List the Profullstack fleet") and enumerates exactly what each entry contains: URL, category, and surfaces. The phrase "every product" signals a complete listing, which implicitly distinguishes it from a search-style sibling, but no sibling is named outright.

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 closing clause "Filter by category or by a surface" tells the agent how to narrow results, which is implied usage guidance. However, there is no explicit statement of when to prefer this over fleet_search_services or any other listing tool, and no exclusions or prerequisites are given.

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