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

Annotations cover the safety profile (readOnlyHint=true, destructiveHint=false, idempotentHint=true), and 'Unsigned transaction ... built for it to sign' is consistent with that: the tool prepares, not executes. The description adds genuinely useful context beyond the annotations: the default consumes all the wallet's tokens of the series unless shares is given, and the payout composition differs for calls vs puts, including an as_shares fallback rationale. It still omits failure behavior if the series is unsettled or the wallet holds nothing.

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 dense sentences that front-load the core operation and immediately follow with the payout breakdown, so the most important facts come first. It is jargon-heavy ('Borro vault shares', 'Steakhouse vault') but that specificity earns its space for this domain.

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 transaction-builder with four parameters, no output schema, and full schema coverage, this is nearly complete: it says what is burned, what is received, what the defaults are, and that the result is unsigned. Missing is any note on what happens when the series is not settled or the wallet holds none of the series.

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 coverage is 100%, so the baseline is 3, and the description goes slightly beyond it by stating the shares default ('All the wallet holds unless shares is given') and by explaining the as_shares fallback condition rather than just restating what it does. wallet and series_id still rely on the schema for their meaning.

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 a specific action and resource (claim a settled option series) and explains the payout mechanics: a call yields Borro vault shares, a put yields USDG or Steakhouse vault shares. It is clear enough to distinguish from siblings like settle_series or buy_option, but it never explicitly contrasts itself with those alternatives.

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?

Usage is implied rather than stated: the series must be 'settled' and the wallet must hold tokens. The only explicit conditional guidance is parameter-level ('with as_shares, for when the vault is short of free USDG'). There is no statement of when to prefer this over settle_series or claim_cover, and no prerequisites or ordering advice.

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