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

Beyond the annotations (destructiveHint=true, idempotentHint=true, readOnlyHint=false) it adds real consequences: past runs are retained in the call log, the monthly rent charge ends, and there is no cost. It stops short of stating required permissions or that the action cannot be undone once confirmed, though 'for good' carries that implication.

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?

Four short sentences, front-loaded with the core action and consequence, then the data-retention clause and the cost note. No filler; even the terse 'Free.' earns its place by removing a hesitation about billing.

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 destructive tool with rich annotations and no output schema, the description covers the key agent concerns: permanence, what survives (call log), what stops (rent), and cost. Only permission/authorization behavior is left unaddressed.

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?

Single parameter with 100% schema description coverage, which already explains that schedule_id comes from schedules_create. The description adds nothing further about the identifier, so the baseline 3 applies.

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 and resource ('Stop a schedule for good'), plus the permanent-deletion nuance implied by 'for good'. It is not explicitly contrasted with the sibling schedules_update, so the agent must infer that this is the permanent variant rather than an edit or pause.

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?

'For good' hints that this is the irreversible option versus schedules_update, but no alternative tool is named and no when-not-to-use condition is given. Usage is implied rather than spelled out.

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