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

Annotations already establish readOnlyHint=true and destructiveHint=false, so the safety profile is covered. The description adds genuinely useful behavior beyond that: the tool does not run the checks itself, it returns links, and the user runs each check on the site which then emails the report — important context for an agent deciding what calling this actually accomplishes.

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?

Three sentences, front-loaded with the enumeration and ending with the off-platform execution model. The final sentence about the user running the check is valuable rather than redundant, though it slightly revisits the 'link to run it' point.

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 zero-parameter list tool with no output schema, the description covers what is returned (what each check answers plus its run link) and the execution model. Nothing essential for calling it correctly is missing, though it does not phrase returns as an explicit structure.

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?

With zero parameters, the baseline is 4 and the description has nothing extra to document. It correctly signals a parameterless lookup rather than suggesting any filtering input.

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+resource (the free checks a contractor can run) and enumerates the three concrete checks: 60-second website audit, missing-leads count, and Google opportunity scan. This makes its scope clear, though it never explicitly names a sibling to differentiate itself from (e.g., google_business_profile_checklist or estimate_missed_call_cost).

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?

Usage is implied by the content — this is the catalog of free checks a contractor can run — but there is no explicit statement of when to call it versus get_offer, get_pricing, or the other sibling lookup tools, and no exclusions. Adequate but leaves routing to inference.

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