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

With no annotations, the description carries the full burden. It discloses that the reminder and history remain intact, that the action is reversible from the NudgeBell dashboard, and that pending steps are canceled. This paints a clear non-destructive, reversible picture, though it does not cover permissions or edge cases like pausing an already-paused reminder.

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 with no waste: the first front-loads the action and effect, the second adds reversibility and usage guidance. Every sentence earns its place.

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 one-parameter tool with no output schema and no annotations, the description covers purpose, behavior, and selection criteria. It does not discuss return values or errors, but those are not essential for this simple operation, and the default/reversible guidance is strong.

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 schema already describes reminder_id fully (100% coverage), so the baseline is 3. The description adds no additional parameter meaning, but none is needed for this simple single-parameter tool.

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 action ('Stop a reminder and cancel its pending steps') and explicitly differentiates from cancel_reminder by calling itself reversible and the default. An agent can distinguish it from cancel_reminder without opening the schema.

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?

Directly instructs to prefer this tool over cancel_reminder unless the user explicitly asked to delete or stop permanently. This is an explicit when-to-use and when-not-to-use guideline, leaving no ambiguity.

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