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

The description adds context beyond the annotations: the call is free and the response carries price, endpoint and input for each service, which the readOnlyHint alone would not convey. It does not cover ordering, list size, or whether auth is needed for the listed endpoints, but the annotations already establish this is a safe read.

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 front-loaded sentence that leads with 'Free.' before naming the resource and contents. No filler, no repetition of the title.

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 input or output schema, the description must stand alone, and it states what is returned and that the call is free. Minor gaps remain about ordering and whether the listed prices/endpoints are current, but nothing prevents a correct call.

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?

The tool takes zero parameters, so the baseline is 4 and there is nothing to mis-specify. The description's mention of what each entry contains (price, endpoint, input) usefully frames the output in the absence of any schema fields.

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 a specific verb and resource ('Lists every Lordevo pay-per-call service') and enumerates the categories covered (quick checks, AI verdicts, LITE tiers, SEO/security/content services). This cleanly separates it from every sibling, which are single-purpose action tools rather than a catalogue.

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?

'Free' plus 'pay-per-call service' implicitly tells the agent this is the zero-cost discovery step before invoking any of the priced sibling tools. It lacks an explicit 'call this first to pick a service' instruction or named alternatives, so it stops short of full guidance.

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