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

Annotations already declare readOnlyHint, idempotent, and non-destructive, so the 'only reads' sentence is partly redundant. However, the description adds genuinely new behavioral context by explaining the semantics of permission values (allowed / partially = own objects only / forbidden) and that a participant count accompanies each role.

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?

Three tight sentences, front-loaded with the return content, then the permission-value legend, then the alternative tools. No filler sentences.

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?

There is no output schema, but the description compensates by stating what is returned (roles, permissions, participant counts) and decoding the permission enum values. Nothing an agent needs in order to call or interpret it is missing.

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 single parameter's description already points to workspace://list as the source of workspace_id. The description adds no further parameter detail, so this sits at the baseline for fully documented schemas.

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 opens with a specific verb and resource: it returns account roles together with their permissions and the participant count per role. It also names the sibling tools that handle create/modify and delete, so an agent can immediately tell it apart from save_workspace_role and delete_workspace_role.

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?

Explicit routing is given: this tool only reads, and the description states that role creation/modification goes to save_workspace_role while deletion goes to delete_workspace_role. The conditions selecting the alternatives are stated, not inferred.

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