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

The readOnlyHint annotation already covers side-effect safety. The description adds only pricing/tier details like 'Priced B1' and does not disclose ranking order, pagination, or response shape, so it contributes little behavioral information beyond the annotation.

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?

The description is two short sentences with the core outcome front-loaded. The pricing clause is extra, but it is concise and points to a source of details, so there is no real redundancy or 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 and most parameters undocumented, the description needed to explain what 'leaders' means, how limit behaves, and what a call returns. It only states the basic purpose and price, so an agent would still be guessing about key operational details.

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 only 33%: only the context parameter is described in the schema. The description partially clarifies that the required slug refers to an industry vertical, but it does not explain limit semantics or otherwise compensate for the missing parameter documentation.

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 states a concrete outcome: 'Top-rated providers in an industry vertical,' and the tool name uses a specific verb and resource. It does not explicitly contrast with sibling leader tools like get_area_leaders or get_country_leaders, but 'industry vertical' provides enough scoping to make the purpose clear.

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?

There is no guidance about when to use this tool instead of the many find/get leader alternatives. The description only says what it returns and mentions pricing, leaving selection context entirely implied.

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