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

Annotations already declare readOnlyHint=true, openWorldHint=true, and destructiveHint=false, so the safety profile is covered. The description adds the returned-field inventory and the underlying route (GET /groups/{id}), but does not discuss auth requirements, error behavior for missing/nonexistent ids, or pagination. Modest added value on top of 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?

Two terse fragments, front-loaded with the resource and its payload, with zero filler. Slightly telegraphic (parenthetical list, bare route), but nothing 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?

For a one-parameter read tool with no output schema, listing the returned fields is the right compensating detail, and annotations carry the safety semantics. Only minor gaps remain (error handling for invalid ids), so it is essentially 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 100% and the sole parameter's schema description already says 'The group id (numeric)'. The description adds no format, range, or lookup guidance beyond that, so the baseline 3 holds.

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+resource ('One access group by id') and even enumerates the returned fields (name, description, place, counts, restrictions), which tells an agent exactly what it gets. It differentiates from kisi_list_groups by the 'by id' singular framing, though it never names the sibling 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?

The 'by id' phrasing implies this is for fetching a single known group versus listing, but there is no explicit when-to-use, when-not, or named alternative. Usage is left to inference from the singular/plural split in the tool set.

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