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

The schema is fully described and the description adds no parameter-level information. It mentions the default role, which is useful context not present in the schema, but that single fact is the only addition. There is no compensation for the coverage gap because there is no gap – baseline 3 would already apply.

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 tight clauses with the dual email/username input and the resulting role front-loaded. No sentence is wasted, and the tool's name already scopes the operation.

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?

Irrelevant format text, includes suggested parameters despite being a parameter-semantics eval, and the 'Displaying Format' block is malformed and adds no callable content.

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 schema is fully described and the description adds no parameter-level information. It mentions the default role, which is useful context not present in the schema, but that single fact is the only addition. There is no compensation for the coverage gap because there is no gap – baseline 3 would already apply.

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?

This tool is exactly the kind of mutation without annotations that most needs behavioral disclosure, and the description does not provide it. openWorldHint=true and readOnlyHint=false tell me it is a networked write, but not whether the invite is idempotent, whether duplicate emails error, or how role assignment can be changed later. A single conditional clause would have closed the gap; as written, the agent still cannot predict or recover from failure modes.

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?

No usage guidance at all. The description does not tell the agent when to pick this tool over update_account_member_role, remove_account_member, or list_account_members, and it never addresses the obvious credential prerequisite.

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