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

Annotations already declare readOnlyHint, idempotentHint, non-destructive and closed-world, so the safety profile is covered. The description usefully adds the credit cost (Tier 2, 20 credits), the deterministic algorithm source (PyJHora sataatbika.py port) and structural rules of the cycle, but says nothing about what the response looks like or lineage of the returned periods.

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?

Purpose is front-loaded in the first clause, followed by compact supporting detail (planet sequence, distribution) and metadata tags. The planet/period chain is dense but each element carries real information; there is little waste.

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?

Output schema exists so return values need not be described, and parameters are fully documented in the schema. The description covers the algorithm and cost adequately; its only real gap is not stating that this is the mahadasha (top) level of the hierarchy relative to its siblings.

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%, so the schema already documents the birth-data body, fields compact mode and precision. The description adds no parameter-level meaning at all, so the baseline 3 applies.

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 subject: the Shatabdika 100-year nakshatra dasha cycle, with planet sequence, seed nakshatra and distribution rule. It clearly identifies the dasha system, but never explicitly says this tool returns the mahadasha-level periods (as opposed to the antar/pratyantar/prana/sookshma siblings in the same family), so sibling differentiation is left implicit in the name.

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 guidance on when to call this versus the four other shatabdika sibling tools (antar, pratyantar, prana, sookshma), nor any statement of prerequisites such as needing birth data. The reader is left to infer the level of the dasha hierarchy from the tool name alone.

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