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

The description adds behavioral context beyond annotations: it reveals that this is a destructive replace operation (consistent with destructiveHint) and that enabling rules cannot activate delivery if the Helvabase engine is disabled. It also notes the revision-based concurrency and the need for user direction, which are not in annotations.

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 four sentences, each adding value: purpose, configurables, caveats, and user direction. It is front-loaded with the key action and access restriction, and avoids redundancy.

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 the tool's complexity (nested rules, revision checks, idempotency, destructive nature, and external dependency on the engine), the description covers the major use conditions and caveats. It lacks explicit details on response or error handling, but since no output schema exists and the operation is straightforward in outcome, this is acceptable.

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 documentation coverage is low (33%), with only idempotencyKey described. The description compensates by listing the configurable aspects: 'days before due date, one overdue reminder, assignments, evidence renewals and digests,' which map to the rules object fields. It also implies the role of expectedRevision through 'against their current revision,' but does not detail its format.

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 a specific action: 'replace the workspace's deterministic reminder rules against their current revision.' It identifies the resource (workspace reminder rules) and the operation (replace), distinguishing it from personal preference tools by noting 'Personal preferences still apply.'

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?

It provides clear guidance on when to use: 'Owner/admin only' and 'replace the workspace's deterministic reminder rules,' implying it is for workspace-level rule changes, not personal. It also warns to 'Obtain the user's direction before changing rules.' However, it does not explicitly name the alternative tool for personal preferences, but the distinction is implied.

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