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

Annotations already declare readOnlyHint=true, idempotentHint=true, destructiveHint=false and openWorldHint=false, so the safety profile is covered. The description adds the output footprint (sun/moon/ASC + theme) and cost/credit context, which is genuinely useful, but says nothing about auth, rate limits, or computation caveats.

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 core sentence is short, front-loaded, and free of filler. The bracketed group/cost lines are metadata rather than prose waste, so the whole thing reads efficiently, though it is arguably too terse for a 15-parameter tool.

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 needn't be re-explained, and annotations cover the safety profile. However, for a 15-parameter tool with low schema coverage, the one-line description plus routing metadata leaves usage and parameter handling under-specified.

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?

With 15 parameters and only 33% schema description coverage, the description is expected to compensate and adds no parameter meaning at all – it names none of time, timezone, ayanamsa, houseSystem, fields, or precision. An agent must infer everything from the schema's own partial docs.

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?

States a specific act (treat the proposed founding date as a chart) and the concrete return (sun/moon/ASC + theme), so an agent knows exactly what it produces. It does not, however, distinguish itself from the surrounding business* siblings (electional_day, founder_personality, name_suggestions) or the muhurat business-start tool.

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 prerequisites, and no named alternative. The only orienting metadata is the '[Group: Business Astrology]' and cost tags, which tell the agent where it sits but not when to pick it over the many other business/electional tools.

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