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

Annotations already declare readOnly, idempotent, non-destructive, and open-world. The description adds genuine context beyond them: which contract calls (get_circle, get_params) supply the record and rules, and the fallback behavior of using the contract view list_members when no read API is configured.

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?

Two sentences, front-loaded with the tool's purpose and followed by data-source and unit details. Little waste, though the parenthetical contract-call names are dense and the unit note is more output semantics than purpose.

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 no output schema, the description usefully sketches what is returned (record, rules, members) and clarifies that credit amounts are string values in the smallest unit with 6 decimals. Given only two optional parameters and annotation coverage of the safety profile, this is close to sufficient.

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%, so both parameters are already documented in the schema and the baseline is 3. The description adds no meaning for members_limit or members_status; its note about credit amounts in the smallest unit concerns returned values, not parameters.

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 and scope: an overview of one x207 mutual-credit circle covering its contract record/rules and its members. This clearly distinguishes it from epoch_report, order_status, and search_listings, though the member-listing portion overlaps with x207_member_inspect without an explicit boundary.

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?

Use is implied by the word 'overview' and by describing what it aggregates, but there is no explicit when-to-use guidance or statement of when to prefer x207_member_inspect or x207_epoch_report instead.

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