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

Annotations cover the safety profile (readOnlyHint=true, non-destructive, closed-world), so the description need not restate those. It adds the concrete content of the return payload, but does not mention caching, freshness, or formatting. Adequate but not rich.

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 tight sentence that front-loads the content categories and names the business. No 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 parameters, full schema coverage, and annotations carrying the safety profile, this is nearly complete. A brief note on whether results are static or could change would make it fully self-sufficient, but nothing essential is missing.

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?

There are zero parameters, so the baseline is 4. The description correctly identifies this as a no-argument lookup by not implying any inputs.

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 resource (Western Sky Heating and Cooling) and enumerates exactly what it returns: services, service-area cities, and phone numbers. An agent can distinguish it from siblings like check_service_area because it describes a static info lookup rather than an area check or booking action.

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?

Lists what info is available, which implies this is the tool for basic business details, but there is no explicit when-to-use versus siblings. The relationship to check_service_area (which handles area queries) is left to inference.

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