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

Annotations already declare readOnly, idempotent, non-destructive, openWorld. The description adds genuinely useful non-schema context: the result set is exactly 38 titles, and the call is 'Keyless' (no authentication required). It does not describe response shape, but annotations cover the safety profile.

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, front-loaded with what the tool returns and backed by illustrative examples. The routing sentence is slightly compressed but earns its place; 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?

No output schema exists, so the description sensibly characterizes the return content (official titles plus names) and pins the size at 38. For a trivial zero-param lookup, nothing an agent needs is missing, though a note on ordering or format would close the remaining gap.

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?

Zero parameters, so there is nothing to document and the baseline of 4 applies. The description correctly implies a no-argument enumeration rather than implying any filtering options that do not exist.

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 and resource ('List all 38 published titles of the American Samoa Code Annotated with their official names') and gives concrete content examples (Title 46 Criminal Justice, Title 42 Domestic Relations). This makes it immediately distinguishable from as_search and as_statute, which retrieve content rather than enumerate titles.

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?

Explicitly frames the use case ('when you know the subject but not the title number') and names the alternative ('call this or as_search before guessing a citation'). It lacks a clear when-NOT-to-use condition, but the routing intent is unambiguous.

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