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

Annotations already declare readOnlyHint/destructiveHint=false, so the safety profile is covered. The description adds real context beyond them: a reminder is time-bound rather than day-bound, and its provenance and status lifecycle (pending/sent with sent_channel/cancelled) are disclosed.

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-loads the core statement, then adds conceptual context and the status legend. Slightly long but each block carries information; no filler sentences.

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?

There is no output schema, yet the description never describes the shape of a returned reminder (fields like time, text, channel other than the passing mention of sent_channel). Concept and filtering are well covered, but an agent cannot anticipate return values.

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 the baseline is 3, but the description adds meaning to the status enum (pending = not yet fired, sent = already delivered with a channel, cancelled = withdrawn) that the bare enum values do not convey. desde/limit/workspace_id are left entirely to the schema.

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 the resource precisely ('los recordatorios del workspace') and scopes it to both upcoming and already-fired reminders, which separates it from cancel_reminder/update_reminder implicitly. The verb is only implied by the name, so sibling differentiation is not spelled out.

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?

Explains what a reminder is, where it originates (daily-note line, task with remind_time, chat bot) and what each status filter means, which implies how to use the status parameter. It never says explicitly when to call this instead of get_agenda or get_tasks, so usage is inferred rather than stated.

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