Site groups

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

Annotations already declare readOnlyHint, idempotentHint and destructiveHint=false, so the safety profile is covered. The description adds genuine semantic value by defining id 0 as the default group, but says nothing about whether the set is static, how many entries exist, or what the entries contain beyond ids.

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 front-loaded sentence with no filler; the most decision-relevant fact (id 0 = default) is included rather than padded with boilerplate.

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 zero-param enumeration with no output schema, the description is adequate but thin: it never says what a returned entry looks like (id plus name?) or whether the list is stable, which is the missing piece when no output schema exists to carry that load.

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 the baseline is 4. The description's note about id 0 applies to returned values rather than inputs, but for a no-argument lookup there is nothing further the description could document about parameters.

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 the resource precisely: available site groups/classification ids, and usefully flags that id 0 is the default. It is clearly a read-only enumeration tool, distinguishable from siblings like site_list or site_get, though the verb ('list'/'retrieve') is implied rather than stated.

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 and no mention of alternatives. The natural use case — calling this to resolve valid group ids before site_create or similar — is left entirely to inference.

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