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

Annotations already declare destructiveHint=true, readOnlyHint=false and idempotentHint=false. The description adds genuinely new behavior: a request_key is single-use and a replayed key with changed intent fails, which is important operational context not derivable from the annotations. It does not clarify the confirmation_token round-trip beyond what the schema notes.

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 sentences, both earning their place, with the creation action and its confirmation precondition front-loaded and the idempotency constraint second.

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?

No output schema exists, and the description omits what happens on a first call carrying no confirmation_token (whether it errors, or returns a token for the second call) and what the created reminder looks like. For a destructive, confirmation-gated create, that loop is the main thing left unexplained.

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%, so the baseline is 3. The description goes beyond the schema by explaining the request_key's one-shot semantics and that the same key with changed intent errors, which is the key parameter behavior an agent needs to avoid failed calls.

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 uses a specific verb and resource ('Create a scoped note or reminder') and scopes it to a lead via the confirmation clause. It does not, however, distinguish itself from the sibling create_note, which an agent must choose between when the intent is a note rather than a time-based reminder.

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?

It states a precondition ('after an explicit confirmation of the exact lead, body, and due date') which implies the correct workflow, but never says when to prefer this over create_note or how to handle the pre-confirmation step. Usage is implied rather than directed.

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