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

Annotations already declare readOnlyHint, idempotentHint, non-destructive and closed-world, so the safety profile is covered. The description adds genuinely useful context beyond that: the auth prerequisite ('requires a linked account (transport auth)') and what the returned data actually represents (file trees baked into a dedicated forked repo).

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?

Two sentences, no filler, and the dual-mode behavior is front-loaded before the supporting detail about the forked repo and auth. Every clause carries information an agent needs.

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 one-parameter read tool with full schema coverage, no output schema, and annotations covering safety, the description supplies everything needed: both return shapes, the mode selector, the auth requirement, and the downstream relationship to purchase_scaffold.

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 parameter's description already says 'omit to list set names instead', so the description largely restates the schema. It adds no format, casing, or matching semantics for the name value beyond what the schema provides, making the baseline 3 correct.

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 names a specific verb and resource ('Lists this account's admin page set names') and gives the exact dual behavior — list names when name is omitted, return a set's files when name is passed. It also frames the resource concretely as the file trees that purchase_scaffold bakes into a forked repo, which separates it from sibling setters like set_adminpageset.

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 states the condition that selects each mode (omit name to list, pass name to fetch) and ties the resource to purchase_scaffold's admin_page_set param, so the agent knows where this data flows. It does not explicitly name set_adminpageset as the mutating alternative or state when not to use this tool, so it stops short of full routing guidance.

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