get_body_measurements

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

With no annotations present, the description carries the behavioral disclosure burden. The verb 'Get' implies a read-only operation and the listed fields indicate return contents, but units, value recency, or other behavior are not disclosed. This is adequate for a simple getter but leaves some gaps.

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 with no filler or redundant phrasing. Every word contributes to identifying the resource and the specific data returned.

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 zero-parameter, read-only getter, the description adequately specifies what the agent will receive and requires no invocation arguments. Minor missing details like units or whether values are current/latest are not critical for tool selection or calling.

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?

The tool has zero parameters, so the schema is trivally complete and the baseline of 4 applies. The description adds useful semantic context by naming the exact measurement fields returned, even though there are no parameter formats to document.

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 clearly states the action ('Get') and resource ('user's body measurements'), then enumerates the specific values returned: height, weight, and max heart rate. It does not explicitly contrast with sibling tools like get_profile, so it falls just short of full differentiation.

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?

No guidance is provided about when to use this tool versus alternatives such as get_profile, get_workouts, or get_sleep. There are no conditions, exclusions, or context signals to help an agent decide between overlapping health-data tools.

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