List Watched Domains

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 still adds value beyond them by naming the returned fields (checks, last/next check times, pause state) and by stating "Free," a cost characteristic that appears nowhere in 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?

One compact sentence-fragment with the key content front-loaded and zero filler. It is on the edge of being too terse, since it omits a verb, but nothing stated is wasted.

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 zero parameters, an output schema present, and rich annotations, the description covers what is returned and its cost. Minor omissions such as result ordering or any cap on the number of watches returned are low-impact given the output schema handles the response shape.

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?

The tool takes zero parameters, so there is nothing for the description to disambiguate. Baseline 4 applies; the phrase "This caller's" correctly signals that no owner/user parameter is needed or accepted.

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?

Names the resource (this caller's watched domains) and enumerates what the listing includes: checks, last and next check times, pause state. An agent can distinguish this from watch_domain/unwatch_domain and from the bulk-check siblings, though it never names those alternatives explicitly.

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?

There is no when-to-use or when-not-to-use guidance and no reference to alternatives such as list_bulk_checks or domain_history. The only scoping cue is the phrase "This caller's," which implicitly limits results to the authenticated caller.

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