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 adds the cost tier (20 credits, Tier 2) and the endpoint, which are genuinely useful beyond the annotations, but it says nothing about output shape, computation limits, or failure modes.

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?

Extremely tight: one identifying line plus structured [Group]/[Endpoint]/[Cost] tags, with the core concept front-loaded. Nothing is wasted, though a single clause on scope (level depth vs. sibling tools) would have cost nothing and added clarity.

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 no explanation, and annotations plus the 100%-covered schema carry most of the burden. What remains missing is routing guidance among the ~45 dasha-family siblings, which is the main decision an agent faces with this tool.

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 100%, including a rich nested description of the birth-data body, ayanamsa handling, timezone semantics and compact-mode fields/precision. The description adds no parameter meaning of its own, so the baseline of 3 for a fully documented schema is correct.

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 names the specific dasha system (Shodashottari) and, via the parenthetical '3-level cascade (MD → AD → 8 PDs)', makes the depth of calculation concrete. That implicitly separates it from the maha/antar/prana/sookshma siblings, but no sibling is named outright, so it falls short of a 5.

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 statement, no prerequisite (e.g. requires birth data), and no pointer to the adjacent maha/antar/prana/sookshma tools for other dasha depths. The agent must infer applicability purely from the tool name.

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