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

Annotations already declare readOnly, idempotent, non-destructive and closed-world, so safety is covered. The description adds the credit cost (20 credits, Tier 2) and tool group, which is useful operational context, but says nothing about output shape, caching, or input sensitivity beyond that.

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?

One sentence of substance, front-loaded with the verb and resource, followed by clearly separated group/cost metadata. No filler, though the very brevity is also the source of the missing guidance.

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?

For a computation tool with 15 parameters and an output schema (so return values need not be explained), the description covers purpose and cost but omits input expectations and what distinguishes a 'power zone'. Adequate minimum but thin for the parameter surface.

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%, so the description would need to compensate, but it adds nothing about the 15 parameters. It never mentions that date/time/latitude/longitude are required, nor how ayanamsa/zodiacType or timezone affect Gauquelin sector results — a real gap since sector positions depend on exact time and location.

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 ('Calculate') and resource ('Gauquelin sector positions (1–36) for all planets'), and adds the interpretive output ('whether each planet is in a power zone'). No close sibling overlaps (no other Gauquelin tool in the list), so differentiation is moot, but the description does not explicitly say how it differs from general aspects/point tools.

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 mention of when a Gauquelin-sector analysis is preferable to other aspect/point tools, and no note of prerequisites such as needing a birth time. The agent is left to infer context entirely.

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