subscription_grace_periods_update_instance

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

With no annotations, the description carries the full behavioral burden, yet it discloses nothing about required permissions, whether the update is partial or full, reversibility, or side effects. Pointing to the OpenAPI schema name for the body is a minor aid but not behavioral context.

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?

It is short and front-loads the endpoint, but the PATCH path is duplicated verbatim in parentheses, which is pure redundancy. The schema reference sentence is the only substantive content.

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 mutation tool with a nested body object, no annotations, and no output schema, the description is inadequate: it neither inlines nor summarizes the update payload and says nothing about effects or responses. An agent must leave the tool definition to find out what a valid update looks like.

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% (id and body both documented), so the schema already handles parameter meaning; baseline 3 applies. The description adds a reference to the SubscriptionGracePeriodUpdateRequest component for the body shape, which slightly helps but does not go beyond the schema.

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 states a specific HTTP verb and resource path ('PATCH /v1/subscriptionGracePeriods/{id}'), which signals an update to a subscription grace period and is distinguishable from the sibling get_instance by name. However, it never explains in plain language what a grace period update does or which fields are mutable, so the purpose is only implied through the raw endpoint.

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 tool versus alternatives such as subscription_grace_periods_get_instance or the app-level grace period relationship tools. The PATCH verb weakly implies 'use this to modify,' but no prerequisites, context, or exclusions are stated.

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