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

Annotations already declare readOnlyHint=false, destructiveHint=true, idempotentHint=true, and openWorldHint=true, so 'WRITE:' merely restates what the structured data says. The description never explains why the operation is destructive — what happens to the existing fulfillment order, whether the change notifies the customer, or whether it can be undone. For a destructive mutation, that is a real gap.

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 short sentences with the mutation type front-loaded and no filler. It is efficient, though the terseness leaves gaps that a slightly longer description would close.

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 five-required-parameter destructive write with no output schema, the description omits consequences, error/precondition conditions, and any indication of what the caller gets back. Annotations plus schema cover formats and safety flags but not the operational context an agent needs to invoke this confidently.

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 100% and all five parameters carry their own descriptions, including format patterns and a pointer to the sibling that supplies fulfillment_order_id. The description adds nothing beyond the schema, 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 precise verb+resource: 'Move a fulfillment order of a prepaid subscription to another date and time.' That is clear and specific. It does not, however, distinguish itself from the similarly named sibling sealsubscriptions_reschedule_billing_attempt, which an agent could easily confuse with it.

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?

There is no guidance on when to use this versus reschedule_billing_attempt, skip_billing_attempt, or edit_subscription, and no prerequisites (e.g. that the order must not already be processed). The only implicit cue is the 'WRITE:' prefix signalling a mutation.

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