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

Annotations already declare readOnly, idempotent, closed-world and non-destructive, so the safety profile is covered. The description adds only the cost caveat (endpoint not in the public credit manifest), which is genuinely useful context, but says nothing about response shape or rate/auth behavior.

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 functional sentence is front-loaded and wastes no words; the chakra list is set off in parentheses. The bracketed [Group]/[Cost] boilerplate is administrative rather than descriptive but costs little.

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 and annotations cover the safety profile, so little more is required. However, the description never disambiguates the required chakra value format against its own capitalized enumeration, nor gives any usage context for a tool with three sibling 'crystals' variants.

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 coverage is 100% and the schema has no enum for chakra ('Chakra name, lowercase.'), so the description's list of the seven chakra values is valuable information the schema omits. Minor friction: listed values are capitalized ('Root') while the schema demands lowercase, leaving exact-string format slightly ambiguous.

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 verb+resource (crystals indexed) and the dimension (a given chakra), which implicitly separates it from the by_purpose and by_zodiac_sign siblings. It stops short of explicitly naming those siblings, so an agent must infer the distinction.

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?

No when-to-use, when-not-to-use, or alternative routing is given. The description only enumerates the chakra values; it never explains when this tool is preferable to astroway_esoteric_crystals_by_purpose_purpose or astroway_esoteric_crystals_recommend.

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