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

With no annotations, the description carries the transparency burden. It usefully discloses the return payload and the one-time nature of the api_key, but it does not explain failure modes, code expiry, idempotency, or any side effects beyond 'completing' registration.

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 sentences with no filler. The core action is front-loaded and the return info is compactly appended. Every element earns its place.

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 confirmation tool with an output schema, this is nearly complete. It explains what the code is for and what the caller gets back; a small gap is not explicitly connecting pending_id to the prior create_publisher step.

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 0%, so the description must compensate. It clearly defines code as the emailed 6-digit code, but pending_id is only implicitly meaningful from the parameter name and the phrase 'Complete publisher registration', with no explicit tie to create_publisher.

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 action, 'Complete publisher registration', with a clear resource and mechanism ('emailed 6-digit code'). It also names the key return values, distinguishing it from siblings like create_publisher.

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?

Clearly implies this is the post-registration step after receiving a code by email, which distinguishes it from create_publisher. It does not explicitly mention alternatives or when not to use it, but the context is strong enough for an agent to infer the correct trigger.

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