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

Annotations already declare readOnlyHint=true, destructiveHint=false, and openWorldHint=false, so the safety profile is covered. The description's one added behavioral fact is sort order ("newest first"), but it says nothing about truncation via the default limit, pagination, or what happens when more than 100 records exist.

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 short sentence with no filler and the ordering fact front-loaded. It is efficient, though the brevity borders on under-specification given the unaddressed limit parameter.

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?

An output schema exists, so return-shape explanation is not required, and annotations cover the safety profile. However, for a list tool the description should still address result cardinality and the default limit, which it does not, leaving a meaningful 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 0% for the single `limit` parameter; it has a type and default of 100 but no textual meaning. The description never mentions the parameter, so an agent cannot tell whether the list is silently truncated at 100 rather than returning everything.

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 and resource ("List body measurements") plus the ordering ("newest first"). It does not distinguish itself from the sibling log_body_metric, so an agent must infer that this is the read counterpart to a write tool.

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 when-to-use or when-not-to-use guidance. The presence of log_body_metric as a sibling makes an explicit "use this to read, use log_body_metric to write" statement the obvious missing piece.

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