Set auto renew

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

Goes well beyond the destructiveHint=true annotation by spelling out the concrete consequence: enabling auto-renewal charges the account balance at each renewal, generates an invoice, and proceeds without further confirmation. It also discloses the required permission scope and API key type, which the annotations do not cover.

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 tight sentences: the core action first, then the high-impact billing caveat and prerequisites. No filler and no repetition of schema or annotation 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 destructive, unauthenticated-visible mutation with no output schema, the description covers the key risk (silent charging), the auth requirement, and the target resource. It stops short of describing failure modes such as missing period on enable, though the schema already flags that requirement.

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% – orderNo format, state semantics and the 'period required when enabling' condition are all documented in the schema. The description adds nothing about parameter values, 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 specific verb pair (enable/disable) and resource (auto-renewal for a service), clearly scoping it to service-level renewal. It does not, however, differentiate itself from specialized siblings like set_domain_auto_renew, disable_network_product_auto_renew, disable_vpn_auto_renew or disable_public_address_auto_renew, leaving the agent to infer that this is the generic service-level variant.

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?

Provides a precondition (requires services:manage and a full-access API key) which helps the agent judge whether a call can succeed. It never states when to prefer this tool over the resource-specific auto-renew siblings, so alternative routing is left implicit.

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