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

Beyond the annotations (readOnlyHint, idempotentHint, destructiveHint=false), the description discloses the key runtime behaviors: it returns an exact preview plus a five-minute confirmation token, and it does not apply the change. The token's expiry window is a concrete, non-obvious operational detail an agent needs.

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?

Three tightly packed sentences with the capability stated first and the non-effects immediately after. There is mild redundancy between 'Requires confirmation' and the closing 'it does not apply the change', but no sentence is wasted.

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, and the description fills that gap by describing the return payload (exact preview + five-minute token). For a single nested-object parameter with nested refs and no output schema, this is nearly complete; only the follow-up apply path and nested option semantics are absent.

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?

With 0% schema description coverage, the description partially compensates by mapping the four top-level field families (goal, provider, currency/locale/timezone, routine choices) to the nested input object. However, it says nothing about the enum meanings — which providers are accepted, or what 'manual' vs 'not_needed' means for routine choices — so nested parameter semantics remain unexplained.

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?

Names a specific verb (prepare a preview) plus the resource (workspace setup preferences) and enumerates the affected field families: setup goal, provider, currency/locale/timezone, routine choices. The `preview_` prefix makes the preview-vs-apply distinction clear, though the description never names the `update_workspace_preferences` sibling that actually applies the change.

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 explicit exclusions — it will not connect a provider, change tax treatment, or enable automatic export — which is strong when-not-to-apply context. It also states confirmation is required, implying the preview-then-apply flow, but stops short of explicitly directing the agent to `update_workspace_preferences` to commit.

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