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

Annotations already flag destructiveHint=true, idempotentHint=true and openWorldHint=true, so the safety profile is partly covered. The description adds genuinely new behavior beyond annotations: the all-seven-weekdays storage model and the partial-merge rule for updates, which is critical to avoid unintended overwrites.

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?

Three tightly packed sentences, front-loaded with the WRITE designation and the merge rule. Each sentence delivers distinct operational value (mutation semantics, merge model, per-weekday fields) with no filler.

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 destructive, nested, 9-parameter write tool with no output schema, the description covers the mutation, the merge model, the per-weekday field meanings, and the endpoint. Missing only ancillary details like auth/permission requirements or whether name must pre-exist for update, which are minor against the whole.

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?

With only 22% schema description coverage across 9 params, the description carries real weight: it explains the per-weekday shape (time1/time2 24h window, exclude to invert, disabled, allday) and, crucially, the merge semantics that govern how partial weekday objects are interpreted. It doesn't address customer_id or the name-as-identifier behavior, leaving some gap.

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?

Opens with "WRITE: create or update a notification schedule," giving a specific verb (create/update) and resource (notification schedule). This cleanly distinguishes it from sibling read tools (nodeping_get_schedule, nodeping_list_schedules) and the delete tool without needing to consult schemas.

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 the create-vs-update distinction via merge semantics: an existing schedule merges the weekdays passed, while a new schedule requires all seven. Also sketches the operational flow ("GET then PUT /schedules/{name}"). It stops short of explicitly saying "call get_schedule first to read current state," so it is clear context rather than full when/when-not guidance.

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