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

Annotations declare readOnlyHint=true, so the safe, non-destructive nature is already known. The description adds valuable behavioral context beyond annotations: no authentication required, free-trial call/time limits, and that cache applies only to input tokens. There is no contradiction with annotations.

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 core purpose and meter constraints are front-loaded and compact. However, the 'Convert to prepaid ACH human retainers' segment with detailed pricing is ambiguous and not clearly tied to invoking the tool, which costs clarity without earning its place.

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 description provides essential call information: HTTP method, parameter names, auth needs, and trial limits. However, there is no output schema, and the description does not explain the shape or contents of the returned quote beyond 'list-price spend quote.' The retainer-pricing sentence further muddies 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?

Schema description coverage is 100% and includes aliases for every parameter, so the schema carries the full semantic load. The description mostly restates the parameter list and the cache rule already present in the schema, adding little new meaning. Baseline 3 is 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?

Opens with a specific verb+resource: 'Return a list-price spend quote for a fleet of agents.' This unambiguously states what the tool does and is not a tautology of the name. No sibling tools exist, so differentiation is not required.

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 clearly frames when this tool is appropriate: for list-price quotes, with no auth, and within a free-trial/stress-test meter context ('100 calls or 14 days from first use'). It does not list exclusions or alternatives, but with no siblings that is acceptable. The 'Convert to prepaid ACH human retainers' sentence adds confusing context rather than clear usage guidance.

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