list_mix_snapshots

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

Annotations already declare readOnlyHint=true, openWorldHint=false and destructiveHint=false, so the safety profile is fully covered by structured data. The description adds nothing beyond that: it does not say what a mix snapshot contains, whether the listing includes metadata such as timestamps, or how the results are ordered.

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 zero wasted words, and the verb-plus-resource structure is front-loaded. It is arguably too terse rather than padded, so it loses only a little for under-specification.

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 values need not be explained and the empty input schema is trivially covered. Still, for a list/restore family the description should note how this listing relates to restore_mix_snapshot, which it omits.

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 schema needs no explanation and the baseline is 4. The description creates no ambiguity about arguments and correctly implies a parameterless enumeration.

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 uses a specific verb ('List') plus a specific resource ('saved mix snapshots'), so an agent can immediately tell what the tool returns. It does not, however, distinguish this from the closely related save_mix_snapshot and restore_mix_snapshot siblings, so it stops short of a 5.

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 guidance on when to call this versus save_mix_snapshot or restore_mix_snapshot, nor any prerequisite or ordering hint (e.g. that a snapshot must exist first). The only implicit cue is the verb 'List'.

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