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

Annotations already declare readOnlyHint, idempotentHint, openWorldHint=false and destructiveHint=false, so the safety profile is covered. The description's genuine addition is the credit cost (10 credits, Tier 1) and the group membership, which is useful operational context. It adds nothing about what the response contains, though an output schema exists.

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 short fragments with no wasted words and the symbolic meaning front-loaded. However, the brevity comes at the cost of substance rather than being efficiently dense – there is little of value to compress.

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 behavior, an output schema covering returns, and a fully documented schema, the one thing the description must supply is what distinguishes this tool from its many geomancy siblings – and it does not. It never states the operation performed or the selection criteria, leaving the agent unable to choose among the 16 sibling figures.

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% for both optional params (fields, precision), and their descriptions are self-explanatory. The description adds no parameter meaning, so the baseline 3 for fully documented schemas applies.

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 "Young man, energy, impulse" restates the title's symbolic keywords rather than stating an action or resource. It never says what the tool actually does (presumably return a geomancy reading for the Puer figure), so an agent learns the figure's meaning but not the tool's function. This is close to tautology against the name/title.

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 guidance, no conditions, and no mention of alternatives. With 16 near-identical geomancy siblings (Puella, Rubeus, Albus, etc.) sharing this shape, the absence of any routing guidance is a serious gap.

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