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

The readOnly and idempotent annotations already establish the safety profile, so the lower bar applies. The description usefully adds ordering ('cheapest first') and scope ('Current models'), but it does not explain the effect of include_retiring, pagination behavior, or what 'current' excludes beyond the default flag.

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?

A single front-loaded sentence that states the resource, ordering, and filter scope without wasted words. The enumeration of kinds is compact and readable.

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?

An output schema exists, so return values need not be described, but the parameter gaps remain significant: limit and include_retiring are undocumented despite zero schema descriptions. The absence of sibling differentiation also leaves the agent without enough context to route correctly among the many model-related tools.

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?

With 0% schema description coverage, the description carries the full burden, yet it only covers provider and kind, and for kind it merely repeats the enum values already in the schema pattern. It says nothing about 'limit' or 'include_retiring', leaving two of four parameters semantically unexplained.

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 and resource ('Current models in the price book') and adds ordering ('cheapest first') plus filtering scope ('one provider or one kind'). It distinguishes itself implicitly from siblings like get_model_price and compare_models, though it does not name those alternatives explicitly.

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?

The description implies usage through filter criteria ('for one provider or one kind') but never states when to choose this over compare_models, get_model_price, or simulate_workload. No exclusions or prerequisites are provided.

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