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

Annotations already declare readOnlyHint, idempotentHint, destructiveHint=false and openWorldHint, so the safety profile is covered. The description adds the PHI sensitivity flag and notes that chart dates accompany each reading, which is useful but limited extra context.

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?

Two dense sentences with the resource and returned fields front-loaded; no filler. The trailing raw endpoint fragment ('Elation: GET /vitals/?patient=') is slightly redundant with the schema but not harmful.

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?

With no output schema, the description usefully enumerates the returned measurement types and mentions chart dates; pagination semantics live in the fully documented schema. A brief note on ordering or response shape would close the remaining 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%, so limit, cursor, offset, patient and visit_note are all documented in the schema. The description only reinforces the patient scoping and does not add format or interaction detail beyond the schema's baseline.

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?

States a specific verb (List) and resource (one patient's vital signs) and enumerates the exact measurements returned (height, weight, BMI, blood pressure, etc.), which cleanly separates it from siblings like list_allergies and list_medications.

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 phrase 'one patient's' implies the tool is patient-scoped and that a patient id is required, but there is no explicit when-to-use guidance, no mention of when to prefer a sibling such as get_visit_note, and no stated prerequisites.

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