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

Annotations already establish readOnly, idempotent, non-destructive and open-world, so the safety profile is covered. The description adds real value by disclosing that the result is assembled from two distinct sources (an on-chain contract record and HTTP read-API endpoints), which implies multiple failure modes, but it never says what happens for an unknown epoch or whether the read-API portions can fail independently.

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 front-loaded sentence that leads with what the tool returns before listing sources; the parenthetical endpoint paths are dense but each earns its place by identifying the data origin. Slightly awkward nesting of clauses, but no filler sentences.

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?

With only two optional parameters and no output schema, the description carries the burden of conveying the return shape, and it does so by naming the four constituent pieces (contract record, summary, metrics, settlements). Only the failure/absent-epoch behavior is left unaddressed.

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 both parameters are already documented, and the description's 'without epoch, the current epoch' merely restates the schema. The settlements_limit parameter is not mentioned at all in the description, so no new meaning is added beyond structured fields.

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 resource (one clearing epoch) and enumerates exactly what is returned: the contract record via get_epoch plus the read-API summary, metrics and settlements. It does not name a sibling to contrast with, but the enumerated sub-resources make it distinguishable from x207_circle_overview or x207_simulate_clearing without opening a 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?

The only guidance is an implicit default ('Without epoch, the current epoch'), which tells the agent how to call it with no argument but not when this aggregate report should be chosen over, say, x207_order_status or x207_search_listings. Usage is inferable rather than stated, with no exclusions.

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