initiate_phone_number_order

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

Annotations are absent, so the description carries the full burden. It only says 'Initiate a phone number order' without disclosing potential billing implications, asynchronous order processing, or how to confirm completion. Given the nature of a purchase, this lack of behavioral detail is a notable gap.

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 very short and follows a clear structure with Args and Returns sections. No filler or redundancy, and the format is easy to parse. However, it is under-specified rather than merely concise, which slightly reduces the score.

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?

The tool initiates an order likely involving billing and asynchronous processing, but the description lacks return value details (just a generic 'Dict[str, Any]') and any information about order status, confirmation, or required preconditions. The mismatch between documented args and the schema further undermines completeness.

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?

The input schema defines a single required 'request' object with additionalProperties true (schema description coverage is 0%). The description lists phone_number and connection_id as parameters, but these names do not appear in the schema, creating a mismatch: the schema expects a 'request' object, while the description implies top-level parameters. This adds some semantic hints but is potentially misleading.

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 uses a specific verb ('Initiate') and resource ('phone number order'), clearly distinguishing the action of ordering a number from sibling tools like get_phone_number or update_phone_number. The core purpose is understandable, though it could be even clearer by explicitly stating 'purchase' or 'buy'.

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?

It provides no guidance on when to use this tool versus alternatives such as list_available_phone_numbers (to find numbers) or update_phone_number (to modify an existing number). No prerequisites, exclusions, or typical scenarios are mentioned.

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