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

Annotations already declare destructiveHint=true, readOnlyHint=false and idempotentHint=false, so the safety profile is covered. The description adds no behavioral context beyond that: it doesn't say whether removal is permanent, whether the address can be re-added, or that the quiz_id scopes the operation to one quiz.

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?

A single short sentence with the action front-loaded and no filler. It is efficient, though the terseness leaves the definition under-informative for a destructive operation.

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 destructive mutation with no output schema, the annotations cover the safety hint and the schema covers the inputs, so the minimum bar is met. What is missing is confirmation that the deletion is irreversible and how it relates to toggle_quiz_email_recipient.

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%, so both quiz_id and email_id are already documented in the schema, including the pointer to get_quiz_email_settings. The description only alludes to 'адрес' and adds no meaning beyond the schema; baseline 3 applies.

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: it removes an email address from the author's notification list. It is distinguishable from add_quiz_email_recipient and toggle_quiz_email_recipient by the delete verb, though it never names those siblings explicitly.

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?

No when-to-use guidance and no mention of the closely related toggle_quiz_email_recipient, which an agent could reasonably prefer if the goal is temporary suppression rather than removal. The agent must infer the choice from the name alone.

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