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

Annotations already declare readOnly/idempotent/non-destructive, so safety is covered. The description adds real behavioral context beyond that: a 30-day retention window, newest-first ordering, and the per-record fields (recipient, subject, sent/failed status and reason), plus the follow-up action. It does not discuss volume or pagination behavior, so not a 5.

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?

Front-loaded with the resource and scope, then the record contents, then the diagnosing scenario and the follow-up tool. Dense but each clause earns its place; the enumeration of email categories is slightly long but functional.

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?

With no output schema, the description compensates by describing what each log entry contains (recipient, subject, status, failure reason), which is what an agent needs to interpret results. It does not clarify required permissions or default result volume, keeping it just short of complete.

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%, and the schema already documents quiz_id, limit (default 20, max 100) and offset. The description adds no meaning beyond that, so it sits at the baseline 3 that applies when the schema carries the parameter burden.

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 resource (the quiz email log) and its scope precisely: last 30 days, newest first, enumerating the categories of emails covered (to you, to respondent, about responses, by rules, digests, events, reminders). An agent can distinguish it from sibling resend_quiz_email_log and other get_* logs without opening the schema.

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?

Names the concrete diagnostic scenario ('answers «emails are not arriving»') and routes the agent to the alternative resend_quiz_email_log for unsent items, which is genuine when-to-use guidance. It stops short of explicit exclusions (e.g. when to prefer get_integration_logs or other log tools), so a 4 rather than 5.

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