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

Annotations already declare this as a non-readonly, destructive, idempotent, open-world operation. The description meaningfully adds context beyond that: it discloses the real side effects (task creation, notifications, webhooks), the idempotency mechanism (unique requestId reused on retry), the version-freshness requirement, and that permissions are enforced at workspace/project/account scope. It stops short of describing what 'replace' does to prior schedule state.

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 front-loaded sentences with the core action stated first, followed by effects, idempotency, and permission notes. Each sentence carries information and there is little filler, though the version/permissions sentences could be tightened.

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 13-parameter, 7-required mutation tool with no output schema and 0% schema coverage, the description covers side effects, idempotency, versioning, and permissions but leaves most parameters undocumented. The safety profile is largely handled by annotations, so it is adequate but has clear gaps an agent would need to guess around.

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 description coverage is 0% across 13 parameters, so the schema carries no field-level documentation and the description must compensate. It explains only requestId (uniqueness/retry semantics) and version (source via get_tasks/get_items/get_workspace), leaving hour, minute, weekdays, timezone, title, paused, remind, missedPolicy, description, id, and projectId entirely unexplained.

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: 'Create or replace a recurring task schedule,' and elaborates on downstream effects (task creation, reminders, notifications, webhooks). This clearly identifies the tool's function, but it never contrasts itself with the closely related sibling schedule_pause, so sibling differentiation is left to inference.

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?

The description implies usage context (idempotent retry via requestId, version freshness for item updates) and points to get_tasks/get_items/get_workspace as version sources. However, it never states when to choose schedule_save over alternatives like schedule_pause, nor any explicit exclusions, so guidance is only implied.

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