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

Annotations already declare idempotentHint=true and destructiveHint=false, so the safety profile is covered. The description adds real value beyond that: it discloses that ALL open reminders are affected (a bulk side effect an agent could otherwise miss) and that the same idempotency_key must be reused on retries, which is the key behavioral contract for safe retry.

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, front-loaded with the action and scope, followed by the retry contract. No filler or restatement of the title.

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, non-destructive, idempotent mutation with no output schema, the description covers what is affected and how to retry safely. Only the conversation_id parameter's provenance is left entirely to the schema, a minor gap.

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 50%: idempotency_key is fully documented in the schema, while conversation_id has only a uuid format and no prose. The description reinforces the idempotency_key retry semantics and implies conversation_id via 'on a conversation', but adds no format or sourcing detail for the id. Baseline 3 is appropriate.

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 ('Dismisses') and resource ('every open reminder on a conversation'), with the scope qualifier 'every open' making clear it is a bulk operation rather than a single-reminder one. It is distinguishable from set_conversation_reminder and dismiss_notification, though it never names a sibling 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?

The phrase 'as the bell's Dismiss does' anchors the tool to a known UI action, which implies when to reach for it, and the retry sentence gives operational guidance. There is no explicit statement of when not to use it or which sibling to prefer for single-reminder or notification dismissal.

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