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

Annotations already declare this is a safe, read-only, closed-world operation, so the safety profile is covered. The description adds that the payload is explanatory reference content rather than live data, but discloses nothing further (e.g., static vs dynamic, freshness) beyond what the annotations imply.

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 with no filler, front-loaded on what a Pro Site is before listing coverage. Slightly list-like but 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?

With no parameters, no output schema, and read-only annotations, the description's coverage list is essentially sufficient for an informational lookup. Only routing guidance relative to its many siblings is missing, which is not strictly required here.

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, which is the baseline-4 case. No parameter meaning is required, and the description correctly signals a no-argument informational fetch.

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 clearly states this returns informational content about a "FindingLeads Pro Site", enumerating the specific subtopics (definition, pages, editable vs fixed, cost, how to start). It distinguishes the resource from siblings like pro_site_start_link and pro_site_custom_domain, though it never names a verb or contrasts those siblings explicitly.

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 when-to-use or when-not-to-use guidance. An agent cannot tell from the text whether to call this before pro_site_start_link, after get_pricing, or instead of them, and the overlap with the 'where to start one' sibling is unresolved.

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