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

Annotations already declare readOnlyHint, idempotentHint, openWorldHint and destructiveHint=false, so the safety profile is covered. The description adds useful scope context — that both current and past series are returned along with settlement data — but says nothing about result volume, ordering, or whether unfiltered calls return everything.

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 fragment with zero redundancy and the most informative content (scope plus returned fields) up front; it errs toward under-specification rather than verbosity.

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 two-optional-filter read tool with no output schema, the description conveys the returned fields reasonably well, but it leaves the agent guessing whether parameters are filters, whether results are paginated, and how it relates to the settlement-specific sibling.

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 50%: 'asset' is documented as a ticker in the schema, while 'state' is an undescribed current/past enum. The phrase 'current and past' loosely maps to the state filter, but the description does not explain that asset is a filter or confirm that both parameters are optional.

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 the resource (series) and the fields returned (settlement round, price, settler), so the retrieval intent is inferable, but it is a noun-phrase fragment with no verb and no differentiation from siblings like get_series_settlement or list_markets, which also deal with series data.

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 use this tool versus get_series_settlement, list_markets, or get_events, and no statement about whether the filters are optional or what happens when none are supplied.

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