subscription_groups_update_instance

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

With no annotations, the description carries the full disclosure burden and delivers almost nothing: no mention of required permissions, whether the PATCH is partial or full replacement, reversibility, rate limits, or error behavior. Only the HTTP verb hints at partial-update semantics.

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 endpoint-first, but the parenthetical (PATCH /v1/subscriptionGroups/{id}) duplicates the preceding clause verbatim with zero added information, wasting roughly half the text.

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 endpoint with a nested JSON:API body, no annotations, and no output schema, the description is far too thin. It never states what the update affects, what constitutes a successful response, or how failures surface, leaving an agent without the context needed to invoke it 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% (id and body both documented), so the baseline is 3. The description adds only a pointer to the external OpenAPI SubscriptionGroupUpdateRequest schema for the body envelope, which does not actually resolve the body's field semantics for the agent.

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 gives the HTTP verb and resource path (PATCH /v1/subscriptionGroups/{id}), so an agent can infer it updates a subscription group instance. However, this largely restates the tool name in URL form and adds no semantic detail about what a subscription group is or which fields are mutable, so it barely distinguishes itself from the many sibling *_update_instance tools.

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 when-to-use guidance, no prerequisites, and no routing to alternatives. An agent gets no signal about whether this is the right tool versus subscription_groups_create_instance, subscription_groups_delete_instance, or the version/localization update tools.

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