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

Annotations already declare readOnlyHint, idempotentHint, destructiveHint=false and openWorldHint=false, so the safety profile is fully covered. The description's one genuinely additive piece of information is the cost line ('10 credits, Tier 1'), which is billing behavior not present in the annotations. It says nothing about how the chart is computed, what happens with missing optional fields, or any latency/credit-consuming behavior beyond the flat fee.

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 text is two short lines, front-loaded with the purpose statement and followed by bracketed metadata, with no filler or repetition. It is efficiently structured, though the bracketed tags are tooling boilerplate rather than descriptive content.

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?

An output schema exists so return values need not be explained, but for a 15-parameter astrological calculation tool with four required inputs the description is far too thin: it omits the input requirements, the derivation logic (birth data to element), and the meaning of the many optional astrology knobs. An agent would have to infer nearly everything from the schema alone.

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 only 33% across 15 parameters, so the schema does not carry the load, and the description compensates with nothing. It never mentions that date, time, latitude and longitude are required, nor does it clarify the interaction of timezone vs timezoneOffset, the zodiacType/ayanamsa choice, or the compact-mode fields/precision pair.

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 'Grooming focus + frequency by element' names the resource (pet grooming guidance) and its organizing axis (elemental astrology), but gives no verb and never explains that the element is derived from the birth-chart inputs rather than supplied directly. It does not distinguish itself from close siblings such as astroway_pet_diet_by_sign, astroway_pet_health_tips, or astroway_pet_training_style, all of which produce parallel 'advice by astrological factor' outputs.

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 prerequisite information (e.g., that a pet's birth date/time/place is needed), and no mention of any alternative sibling tool. The only contextual text is a group tag and a credit-cost tag, which do not help an agent decide whether this is the right tool for a grooming question.

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