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

Annotations already declare readOnlyHint=true, idempotentHint=true, destructiveHint=false, and openWorldHint=false, so the safety profile is fully covered. The description adds the returned field inventory, which is useful context absent an output schema, but it discloses no additional behavioral traits such as auth requirements, error behavior, or rate limits.

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 the verb and resource first and the field inventory after. The enumerated list of nine fields is slightly long but each item is informative for a detail-fetch tool with no output schema.

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?

With no output schema, the description usefully enumerates what is returned, and annotations cover the safety profile, so an agent has what it needs to call the tool. It falls short on how to obtain a role_id and what happens if the ID is invalid.

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 single role_id parameter has 0% schema description coverage, so the description must compensate and it does not — role_id is never mentioned, nor is its UUID format or required status. 'One of your roles' hints at identification but adds no usable syntax guidance.

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 ('Shows') and resource ('one of your roles') and enumerates the fields returned in full. The singular 'one of your roles ... in full' implicitly distinguishes it from list_roles, but no sibling is named 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?

Usage is only implied: fetch the complete detail for a single role. There is no explicit when-to-use guidance, no statement of when to prefer this over list_roles, and no mention of prerequisites such as needing a valid role_id.

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