get_profile_settings

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

Annotations already declare readOnlyHint=true and openWorldHint=true, so the safety profile is clear without the description's help. The description adds value by naming what comes back (units, time zone, height, birth date, activity level), but says nothing about whether settings are user-scoped, whether they can be missing/null, or how fresh they are.

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 the resource named first and the field list after it; nothing is padded. The trailing "etc." slightly undercuts precision by signaling that the list is non-exhaustive without saying so definitively.

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?

There is no output schema, so the description is the only place a caller learns what fields exist, and its list ends in "etc." — leaving the return shape partially unknown. For a zero-parameter read tool this is close to adequate, but a fuller or explicitly non-exhaustive field list would remove the remaining ambiguity.

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 takes no parameters, so the schema has nothing to document and there is no semantic burden on the description. Baseline of 4 applies; no parameter meaning is required or missing.

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?

"Get profile settings" pairs a specific verb with a specific resource, and the enumerated fields (units, time zone, height, birth date, activity level) make the payload concrete. It is distinguishable from the sibling getters, which all target activity/health metrics rather than user profile attributes, though the description never says so explicitly.

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?

Usage is only implied: an agent can infer this is the source of user preferences such as unit system and time zone, which other tools' outputs likely depend on. There is no explicit when-to-use statement, no mention of prerequisites or authentication, and no alternative tool to consider.

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