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

Annotations already declare readOnlyHint=true and the description aligns with that by using 'Get' and the GET method. The endpoint path adds minor context, but the description does not disclose other behavioral traits like whether results may be pending, how to interpret missing results, or any provider-specific caveats. With annotations covering the read-only safety profile, a score of 3 is appropriate.

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 a single concise sentence that front-loads the action and resource, followed by the precise endpoint. No filler or redundant content exists.

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 simple single-parameter read-only tool, the description provides enough context to call it correctly: the resource, endpoint, and read-only behavior are clear. It falls short only in lacking explicit alternative routing and any detail about the response format, but the low complexity and rich annotation coverage keep this from being a significant gap.

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 the only parameter, order_id, is documented as 'The order id (UUID).' The description adds no additional meaning beyond the schema, so the baseline of 3 applies.

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 action ('Get'), a clear resource ('lab-test results'), and a scope ('for an order'), which clearly distinguishes it from siblings like vital_get_order and vital_list_orders. Including the exact endpoint further removes ambiguity.

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 guidance on when to use this tool versus alternatives such as vital_get_order or vital_get_lab_test. The description does not state any exclusions, prerequisites, or contextual cues, leaving the agent to infer usage 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.