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

Annotations already declare readOnly, idempotent, and closed-world, so safety is covered. The description adds non-obvious operational facts the annotations omit: the endpoint, the cost (10 credits, Tier 1), and the required inputs, which materially affect invocation decisions.

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?

Front-loaded with a one-line purpose, followed by compact bracketed metadata. Every element carries information, though the '[Required: name, date]' line partly duplicates the schema's required array.

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, and the description supplies purpose, cost, and endpoint for a simple two-required-param calculator. The main omission is guidance on how this differs in use from sibling numerology tools.

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 50%; the description only restates the required set ('name, date') already present in the schema's required array. It adds no semantics for the two required params (formats, name handling) or for the optional fields/precision params, so it does not compensate for the coverage gap.

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 states a specific verb and resource ('Calculate the Maturity number') and defines the derived quantity ('sum of Life Path and Expression, activates around age 35'), plus the system ('Pythagorean'). This distinguishes it from the many chaldean/kabbalistic/vedic maturity siblings.

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 'activates around age 35' note gives interpretive context, but there is no explicit when-to-use guidance or routing versus siblings like astroway_numerology_pythagorean_life_path or _chart. Usage is only implied by the taxonomy.

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