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

Annotations already declare readOnlyHint, idempotentHint, openWorldHint and destructiveHint=false, so 'read-only' in the description largely repeats structured data. The endpoint path is minor added context, but auth requirements (api_token/app_password/account_id) and not-found behavior are left unaddressed.

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 short, front-loaded sentences with no filler. Efficient, though the second sentence is a bare constraint label rather than a substantive addition.

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 simple read-only getter with no output schema, the description is minimally adequate but silent on return shape and error/empty cases. With 6 parameters (mostly auth) and a multi-workspace caveat in the schema, slightly more context would help.

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 83%, so the schema already documents base_url, api_token, account_id, access_token and app_password. The description adds nothing about user_group_id's format or the workspace-scoping role of account_id, so it earns only the baseline.

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 states a specific verb and resource ('Gets a user group/team by id') and even names the endpoint path '/user_groups/:user_group_id', making the single-entity retrieval nature clear. It does not explicitly contrast with the sibling list_user_groups, but 'by id' distinguishes it implicitly.

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 only guidance is 'Limitations: read-only', which is a constraint rather than a when-to-use statement. There is no mention of when to prefer this over list_user_groups or what happens when the id is unknown.

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