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

Annotations already declare readOnlyHint=true and openWorldHint=false, so safety is covered. The description adds genuine value by enumerating the returned fields (name, description, members, your role), which matters since no output schema exists. It says nothing about behavior when the group is missing or the caller is not a member, so it stops short of rich disclosure.

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 compact sentence fragment with zero filler, and the field list is placed up front. Nothing is padded, though the terseness contributes to the missing parameter context.

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 one-parameter read tool with helpful annotations, the description covers purpose and return shape adequately. The unresolved gap is the origin/format of group_id and error behavior, which leaves it minimally viable rather than 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 coverage is 0% — group_id is a bare string with no format, source, or example. The description never mentions the parameter or explains where to obtain a group identifier, so it does not compensate for the coverage gap despite having only one parameter.

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 resource (one group) and the attributes returned (name, description, members, your role), which distinguishes it from list_groups. The verb is only implied by the name rather than written out, but the singular scope makes intent unambiguous.

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?

The phrase 'One group's details' implies this is for fetching a single group, contrasted implicitly with list_groups, but no explicit when-to-use or when-not guidance is given. An agent must infer that group_id comes from list_groups or create_group.

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