alexa_list_volumes

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

Annotations already declare readOnlyHint=true and openWorldHint=true, so the safe-read profile is covered structurally. The description adds useful scope context — the 0–100 range, that mute state is included, and that not all devices report a value — but says nothing about result shape, grouping, or whether devices that don't report are omitted or null.

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 sentence with no filler; the key scope constraint (all devices that report a value) is packed in without padding. Nothing could be trimmed without losing information.

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 tool with annotations covering the safety profile, the description is mostly adequate, but with no output schema in existence the return structure (per-device mapping of volume and mute) is left entirely to inference. A brief note on the 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?

The tool takes zero parameters, so the baseline is 4. There is nothing for the description to disambiguate, and it correctly implies a global, unfiltered read with no inputs to specify.

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 names the resource (speaker volume and mute state of Alexa devices) and its scope (every device that reports one), which is enough to distinguish it from the mutating sibling alexa_set_volume. It is phrased as a noun fragment describing returned data rather than a verb+resource action, so the read/list intent is implied rather than stated.

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 when-to-use guidance and no reference to alternatives such as alexa_set_volume or a per-device lookup. The qualifier 'every device that reports one' hints at scope but does not tell an agent when this tool is the right choice over its many siblings.

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