update_reminder

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

No annotations exist. The description lacks behavioral details: what fields can be updated, whether the operation is reversible, or any side effects. The empty input schema suggests potential incompleteness.

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?

The description is a single sentence, which is concise but overly terse. It front-loads the purpose but omits necessary detail, making it borderline under-specified.

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?

Given no annotations, no output schema, and an empty input schema, the description is severely incomplete. It does not specify how to identify the reminder, what fields are updatable, or the expected outcome.

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?

The input schema has zero properties, so the description adds no meaning. Even with 100% schema coverage (empty schema), it fails to clarify how to specify which reminder to update or what values to change.

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 clearly states the action (Update) and resource (existing reminder in Reminders.app). It distinguishes from siblings like create_reminder, delete_reminder, and complete_reminder, though no further detail is provided.

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 guidance on when to use this tool versus alternatives. No prerequisites or context for when updates are appropriate, such as needing a specific reminder identifier or list membership.

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