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

Beyond the annotations, it discloses that the key is long-lived, revocable, shown only once, and tied to the current user's session. It also documents auth requirements and error cases (401, 404 on unsupported backends), which materially helps an agent handle the result.

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?

The description is compact and front-loaded: action first, usage next, then one-time visibility and error/auth notes. Every sentence contributes a distinct operational fact with no filler.

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 two-parameter creation tool with no output schema, it covers auth, errors, usage, and the one-time display caveat, which is enough to invoke it correctly. It does not specify the exact response shape, so an agent still has to infer how the returned key is surfaced, but the 'Shown once' note mitigates this.

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 parameter descriptions are already meaningful. The text does not add further parameter-level detail, so this dimension sits at 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 opens with the specific action 'Mint a long-lived, revocable API key' and scopes it to the currently logged-in user. This clearly differentiates creation from the sibling list/revoke tools without needing to open their schemas.

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?

It states the prerequisite ('logged-in user') and the practical context: the key is a Bearer token that enables API access and bypasses ethora-user-login. It does not explicitly name list/revoke as alternatives or give when-not-to-use conditions, but the creation use case is clear.

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