query_live_pricing

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

With no annotations, the description carries the full behavioral burden. It usefully states that canonical registry facts are unchanged, but it does not disclose whether the tool performs a network call, has side effects, respects a timeout, requires authentication, or returns pricing data directly.

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 structurally clean, but it is under-specified rather than usefully concise. The phrase 'Opt in' is unclear and does not earn its place because it obscures, rather than clarifies, the tool's actual behavior.

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 presence of an output schema reduces the need to describe return values, but the tool still has two undocumented parameters and performs a live external inquiry without clarifying key behavior. The description is too thin for an agent to confidently select and invoke this tool correctly.

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 the description does not mention either parameter. 'identifier' is required but its meaning, format, and accepted values are left entirely implicit, and 'timeout' has a default of 5 with no units or behavior explained.

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 conveys that this tool is related to OpenRouter pricing and that canonical registry data is not changed, which helps distinguish it from registry-update tools. However, 'Opt in to an OpenRouter pricing inquiry' is vague and does not clearly state that the tool performs a live pricing query or what it returns.

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 guidance on when to use this tool versus alternatives like get_model_profile, compare_models, or estimate_migration_cost. The reader can infer it is for live OpenRouter pricing, but no selection criteria, prerequisites, or exclusions are provided.

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