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

The description usefully discloses a side effect that annotations do not: EZRentOut may notify the customer depending on account settings. The annotations already flag destructiveHint=true, but the description does not state what a booking changes, whether it is reversible, or what happens if assets are unavailable for the requested period.

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?

Three tight sentences with the purpose front-loaded, followed by the behavioral caveat and the endpoint. Nothing is padding; even the endpoint aids debugging.

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 5-parameter mutation tool with no output schema, the description covers what it does and the notification side effect. It does not cover the resulting state change, failure modes (e.g., assets already reserved), or the response, so the definition is incomplete.

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 coverage is 100%, so the schema already documents every parameter: date formats, time formats, and the order number. The description adds no further detail on date ranges, time zones, or how from/to combine with from_time/to_time, so this is the baseline 3.

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 gives a specific verb and resource: "Reserve an order's assets for a period (books the order)", plus the underlying endpoint PATCH /baskets/<ORDER#>/reservation.api. However, there is no differentiation from close siblings such as ezrentout_rent_out_order, ezrentout_create_order, or ezrentout_add_assets_to_order.

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 gives no guidance on when to use this tool instead of ezrentout_rent_out_order or ezrentout_create_order, and none on prerequisites such as what state the order must be in or whether the assets need to be available. An agent must infer this from the name alone.

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