Perfections

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

Annotations already declare readOnlyHint, idempotentHint, non-destructive, and closed-world behavior, so the safety profile is covered. The description adds only operational metadata (endpoint, group, 10-credit cost), which is useful but not deep behavioral context; it does not explain what the calculation returns or how targetAge affects timing, 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?

The description is extremely short, front-loaded with the core concept, and free of filler. It is arguably under-specified rather than verbose, but in terms of conciseness and structure it is efficient.

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 an output schema and fully documented input schema, the mechanical contract is covered, but the conceptual meaning of 'perfection of aspects' and how targetAge drives the timing result are left unexplained. For a niche Hellenistic technique among hundreds of siblings, this leaves an agent without enough context to know when the tool is appropriate.

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 the nested body schema thoroughly documents date, time, timezone, coordinates, ayanamsa, houseSystem, and targetAge. The description adds no parameter semantics beyond the schema, so the baseline of 3 is appropriate.

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 phrase 'Perfection-of-aspects timing' names a specific Hellenistic technique, but it is jargon-heavy and does not state a verb or resource in plain terms, nor does it differentiate this from the many other hellenistic_hand_* siblings such as bounds or critical_degrees. An agent familiar with the terminology can infer that it computes aspect-perfection timing, but the description itself does not make that fully explicit.

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 guidance on when to use this tool versus alternatives, no prerequisites, and no indication of what kind of question it answers. The 'timing' wording implies a forecasting context, but nothing tells the agent when-perfection-timing is the right choice over profections, decennials, or other timing tools.

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