regru_renew_service

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

With no annotations, the description carries the full behavioral burden. It does disclose that this is a billing operation that incurs cost, which is meaningful context beyond the name, but it omits permissions required, reversibility, and consequences of failure or insufficient funds.

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, front-loaded with the action and followed by a useful cost caveat. Slightly redundant given the period parameter already exists, but there is essentially no waste.

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 billing mutation with no annotations and no output schema, the description gives the essential purpose and a cost warning but leaves gaps around authorization, idempotency, and what happens when funds are insufficient (only implied by the ok_if_no_money parameter). Adequate but not complete.

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%, so all three parameters (service_id, period, ok_if_no_money) are already documented in the schema. The description adds nothing beyond the schema's own parameter documentation, making the baseline 3 appropriate.

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 verb (Renew) and resource (a service), and clarifies scope with examples (domain, hosting, etc.). It is clear what the tool does, but it does not distinguish itself from the sibling regru_set_autorenew, which an agent could easily confuse with an on-demand renewal.

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 explicit when-to-use guidance, no prerequisites, and no mention of the autorenew alternative. The reader must infer that this is for manually extending a service term, with nothing routing them away from regru_set_autorenew.

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