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

Annotations already declare readOnlyHint, idempotentHint, destructiveHint=false and openWorldHint=false, so safety is covered. The description adds genuinely new operational context that annotations do not carry: the POST endpoint and a cost of 10 credits (Tier 1), which matters for an agent budgeting calls. It says nothing about what is returned or the semantics of the reading, so it is useful but incomplete.

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 three-word lead and three bracketed metadata lines are free of filler and reasonably front-loaded (meaning first, then group/endpoint/cost). However, this is under-specification rather than true conciseness: for a tool with fifteen interchangeable siblings, a three-word semantic gloss does not earn its place as the whole description.

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 annotations covering the safety profile, a 100%-covered schema, and an output schema handling return values, the description's remaining job is purpose and sibling routing — exactly what it omits. An agent cannot tell from this text what distinguishes Albus from coniunctio or puella, nor what the call produces conceptually. The cost/endpoint lines help but do not fill the gap.

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% and both parameters are optional (fields, precision), so the schema fully documents them; baseline 3 applies. The description adds no extra meaning about compact mode, dotted-path syntax, or precision defaults, so it neither compensates nor detracts.

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 gives only three symbolic keywords ("Wisdom, peace, clarity") for the figure Albus; it never states a verb or says what the tool actually returns (a figure reading? an interpretation? a chart?). Against 15 near-identical sibling geomancy tools (coniunctio, puella, rubeus, etc.) nothing here distinguishes this endpoint from them. The bracketed group/endpoint lines hint at the domain, but the prose itself is closer to a title gloss than a purpose 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?

There is no when-to-use, no when-not-to-use, and no mention of alternative geomancy figures or how to choose Albus over the other fifteen figure endpoints. The only usable signal is the implicit "this is a geomancy figure" from the group tag. No guidance is provided.

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