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

The annotations already declare that this is a read-only, idempotent, non-destructive, closed-world operation. The description adds useful context about what the list contains and that full details and typical prices come from get_page, without contradicting the annotations.

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 definition is a single front-loaded sentence with no wasted language. It efficiently states what is listed, what is returned, and how it connects to get_page.

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 simple read-only list tool with one optional enum parameter and no output schema, the description is complete enough: it explains the resource, the returned URLs and path, and the handoff to get_page for details and prices.

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 100%, and the single optional category parameter is an enum for plumbing, heating, and drainage. The description mentions those categories but does not explicitly explain filtering behavior or the default when category is omitted, so the schema remains the primary source.

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 uses a specific verb and resource: it lists service pages for plumbing, heating, and drainage, and says the result includes URLs and a path for get_page. This distinguishes it from get_page itself, though it does not explicitly contrast with list_service_areas.

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?

It clearly implies the workflow: call this to discover service pages and then pass the returned path to get_page for full details and typical prices. It does not explicitly state when to use it instead of list_service_areas, but the intended context is clear.

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