sms_quote

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

No annotations are provided, so the description carries the full disclosure burden. It reveals only that the call is free (stated twice); it does not state whether authentication is required, what currency or unit (per SMS vs. per rental period) the price is in, whether the quote is binding, or how it relates to sms_order.

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?

The description is short but front-loaded with a duplicated '(free) (free)' fragment, which is pure waste and suggests sloppy generation. There is no structure beyond a single clause, though it is at least not verbose.

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 tool with two required, entirely undocumented parameters, no annotations, and no output schema, the description is far too thin. An agent cannot know valid input formats or what the returned price represents, so it is not complete enough to drive a correct invocation.

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 0% and both parameters are required, so the description must compensate. Naming 'a service and country' merely restates the schema keys; it gives no format hints such as ISO country codes, accepted service identifiers, or case sensitivity, which an agent needs to construct a valid call.

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 clear verb and resource: fetch the current price for a given service/country combination. However, it does not distinguish itself from the sibling 'sms_pricing' or 'sms_rental_quote', which sound like overlapping pricing lookups, so an agent cannot tell which one to select from the text alone.

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 call this versus sms_pricing, sms_services, or sms_rental_quote, and no prerequisites are stated. The only usage-adjacent information is the duplicated '(free)' note, which tells the agent the call costs nothing but nothing about fit.

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