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

Annotations already cover the safety profile (readOnlyHint=true, non-destructive, closed-world). The description goes beyond that by disclosing exactly what is returned (email, actual verification state) and explicitly scoping out story/coaching history, which is meaningful privacy context. It does not discuss caching, rate limits, or auth prerequisites, so it is strong but not exhaustive.

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 short sentences, front-loaded with the core action, followed by the return payload and the exclusion boundary. Every sentence earns its place and nothing is padded.

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 zero-parameter read with an output schema present, annotations covering the safety profile, and no nested objects, the description supplies everything else an agent needs: identity of the account resource, what fields come back, and what data is deliberately not accessed.

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 tool takes zero parameters, so there is nothing for the description to clarify and the baseline is 4. The empty schema cannot be misinterpreted.

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 verb and resource ('Identify the Afterglow account connected for this conversation') and further specifies the payload (account email and real verification state). The sibling tools operate on a completely different resource (checklists), so no disambiguation is needed.

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?

The phrase 'for this conversation' establishes the context in which the tool applies, and the closing boundary statement ('Does not read your story or coaching history') tells the agent what this tool must not be used to retrieve. It stops short of naming an alternative tool for account-history data, so no explicit alternative routing.

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