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

With no annotations provided, the description carries the full behavioral burden and does so: it discloses irreversibility ('the person cannot undo a claim'), authentication requirements ('Requires sign-in'), the resulting state (free dashboard, latest 50 posts, one per account), and a refusal precondition (account already has a dashboard). That is substantially more than the schema conveys.

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?

Four short sentences, front-loaded with the action, then the consent gate, then preconditions and failure behavior. No sentence is filler; each adds a distinct operational fact.

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 one-parameter mutation tool with no annotations and no output schema, the description covers consent, auth, side effects, and refusal cases well. The only gap is what the call returns on success (dashboard identifier or object), which the agent must infer.

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?

Schema description coverage is 100% and the single preview_id parameter is already documented as coming from preview_profile, so the description adds no new parameter detail. The reference to preview_profile reinforces provenance but does not exceed the schema.

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 states a specific verb and resource — converting a preview_profile result into an owned Flux dashboard — and explicitly ties itself to the sibling preview_profile via the preview_id. An agent can distinguish this from preview_profile or the breakdown tools without inspecting any schema.

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?

It gives an explicit gating condition ('Call this only when the person says the profile is theirs') and names the alternative path when the call is refused ('the breakdown tools still work then'). Both when-to-use and when-not-to-use are covered.

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