Create a volume

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

Annotations already declare readOnlyHint=false, destructiveHint=false, idempotentHint=false, and openWorldHint=false, so the safety surface is covered. The description usefully adds the human-confirmation requirement, but says nothing about what happens on a name collision despite idempotentHint=false making that behavior non-obvious, and nothing about scope or permissions.

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?

Two short sentences with no filler, and the primary action is front-loaded ahead of the caveat. Slightly terse for a creation tool, but nothing is redundant or padded.

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?

Return values need not be described since an output schema exists, and the safety profile is fully covered by annotations, so the remaining burden is small. Nevertheless, collision behavior for a non-idempotent create and any scope/permission context are absent, leaving an agent to guess at failure modes.

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?

Only one parameter, and schema description coverage is 0% — the pattern regex carries all the syntax constraints while the description contributes just the word "named", implying the string identifies the volume. That is a marginal addition over the schema, but the single-parameter baseline keeps it at the middle of the range rather than low.

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 ("Create a named volume") plus the intent behind it (data persistence), which a reader can map onto the create/remove/list/inspect volume sibling cluster. The differentiator versus those siblings is only implied by the verb, not called out 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?

Gives a concrete when-to-use condition — "for data that outlives a container" — which separates it from ephemeral container storage, and adds a process prerequisite ("Confirm with the person first"). No when-not-to-use case or named alternative is offered, so it stops short of a 5.

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