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

Annotations already disclose side-effect behavior via readOnlyHint=false, destructiveHint=true, and openWorldHint=true. The description adds useful behavioral constraints beyond annotations: only verified Cobalt addresses are accepted, unverified addresses are refused, and the email contains only the review link with no caller-supplied text.

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 three tight sentences and is front-loaded with the core action. Each sentence earns its place by covering purpose, recipient restriction, and payload limitation.

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 three-parameter side-effecting tool with no output schema, the description covers the essential behavior: recipient requirements, refusal of unverified addresses, and the limited email content. It could say a bit more about success/failure outcomes, but the key invocation context is present.

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 description coverage is 100%, so the schema already documents review, claim_token, and email. The description reinforces that email must be a verified Cobalt account address but does not add new syntax or format semantics beyond the schema.

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 states a specific verb and resource: email a link to a review. It also names the intended recipient as the person who ran the study, which distinguishes it from sibling review tools such as get_review or create_review.

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 implied: use this tool when you need to send a review link to the study owner. The description does not explicitly say when not to use it or name alternative tools for related tasks, so guidance remains minimal.

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