webmaster_list_hosts

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

Annotations already declare readOnlyHint, idempotentHint, openWorldHint and destructiveHint=false, so safety is covered. The description adds two useful behavioral facts beyond that: results are paginated/bounded, and the scope is limited to sites the server account can access. It does not describe ordering or paging traversal behavior.

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?

A single efficient sentence with the scoping/bounded-page constraint front-loaded and no filler. It errs on the side of sparseness rather than verbosity.

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?

An output schema exists, so return values need not be explained, and annotations carry the safety profile. However, for a paginated list tool with two undocumented parameters, the description should clarify paging mechanics to be fully complete.

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 0% for both parameters; limit and offset have only defaults and no semantics. The description's 'one bounded page' implies pagination but does not explain what limit and offset control or how to page through results, so it only marginally compensates for the coverage gap.

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 (read/list) and resource (sites accessible to the server account), and the 'one bounded page' phrasing signals a paginated listing. It does not explicitly distinguish itself from the sibling webmaster_get_host, which retrieves a single site, leaving that differentiation to inference.

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 guidance, no mention of prerequisites (e.g. which account), and no routing to alternatives such as webmaster_get_host for a single site. Usage is only implied by the resource being listed.

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