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

Annotations already declare readOnly, idempotent, non-destructive and closed-world, so the safety profile is covered. The description adds genuine value beyond that by disclosing the shape of the payload (alias names, per-compound U.S. status, page link) and the fixed catalog size, which matters because there is no output schema.

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 content inventory is front-loaded before the usage cue. Every clause carries information (catalog size, alias types, per-item fields, purpose).

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 output schema and only one optional parameter, the description adequately covers what a caller gets back and why to call it. It falls short only in not stating the unfiltered default behavior or how it relates to the status-lookup siblings.

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 is a single optional us_status filter at 100% schema coverage with an enum, so the schema fully documents it. The description never mentions the filter or its semantics, adding nothing beyond the structured field — the baseline 3 for high schema coverage.

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 states a clear resource — a catalog of 26 compounds and 3 blends with aliases, U.S. status and page links — so an agent knows this enumerates the coverage universe. It does not explicitly name or contrast itself against the siblings (check_legal_status, recent_changes, status_in_place), so differentiation is only implied.

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?

"Use it to see what is covered" gives a directional usage cue, but there is no when-not guidance and no mention of the alternative tools for looking up a single compound's status. Usage is implied rather than specified.

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