With Changing Lines

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

The annotations already declare readOnlyHint=true, idempotentHint=true, destructiveHint=false, and openWorldHint=false, so the safety profile is covered. The description adds useful operational context with the POST endpoint and a 10-credit cost, but it does not disclose any further behavioral traits beyond that.

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?

The description is compact and front-loads the output description, with endpoint/group/cost metadata kept in clearly separated brackets. It is not verbose, though its terseness borders on under-specification rather than polished conciseness.

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?

The output schema and annotations cover return values and safety, and the description notes cost and endpoint. However, for a tool in a crowded I Ching family it omits any sibling differentiation and gives no explanation of the optional seed parameter, leaving key selection and invocation context missing.

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?

The schema has one optional 'seed' parameter with 0% description coverage, and the tool description never mentions seed, its accepted format, or what it controls. With low schema coverage the description should compensate, but it adds no parameter meaning at all; the only mitigating factor is that the parameter is optional and singular.

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 fragment 'Primary + transformed hexagrams' describes the result shape but does not state the action (cast, calculate, or retrieve) or explicitly say it produces an I Ching reading. It is more informative than the title alone, but the purpose remains vague rather than a clear verb+resource statement.

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 description gives no when-to-use guidance, no exclusions, and does not name any alternative among the close I Ching siblings such as astroway_iching_throw_coins, astroway_iching_by_question, or astroway_iching_daily. An agent receives no basis for choosing this tool over them.

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