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

Annotations already declare destructiveHint=true, idempotentHint=true and readOnly=false, so the safety profile is largely covered. The description does add genuine non-annotation context (the side effect on the Dizko taste model, plus the user-confirmation prerequisite), but it never says what 'hides' concretely means, whether it is reversible, or how to undo it.

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 short sentences with zero filler; the restrictive usage gate is front-loaded before the behavioral explanation, which is the correct priority for a conditional mutation.

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?

This is a destructive, non-read-only tool with three required parameters, one of which (idempotency_key) is a 16-128 character client-supplied token that is never explained, and no output schema exists. The description omits permanence/reversibility, failure behavior, and retry semantics, leaving real gaps for an agent to guess at.

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 0% for all three required parameters, and the description never mentions event_id, confirmed, or idempotency_key. The phrase 'user confirms' faintly gestures at the confirmed boolean, but nothing explains the idempotency key's role or the accepted identifier format, so the description fails to compensate for the coverage gap.

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 names a concrete action and two effects: it 'hides the event' and 'teaches their Dizko taste model.' That is enough for an agent to tell it apart from save_event or record_event_feedback, though the word 'bin' itself is never reconciled with 'hide' in the description text.

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?

'Use this only when the user confirms an event is not for them' supplies an explicit gating condition and implies the negative case (do not call without confirmation). It stops short of naming a sibling alternative, e.g. whether softer negative signals should go to record_event_feedback instead.

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