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

No annotations are provided, so the description carries the full burden. It discloses the tool's non-rectification behavior, the output categories (stable items, possible lagnas, indeterminate items), and the constraint on the window size. It does not mention whether the tool requires a place/date or what happens if the window crosses midnight, but the core behavioral traits are well covered.

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 description is compact, front-loaded with the core concept, and every sentence adds value. It uses a clear example, a warning, and a constraint without redundancy. The structure is easy to scan and the key message (not rectification) is emphasized.

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?

The tool has an output schema (not shown here) and 8 parameters, but the description covers the essential usage context: what the tool returns, what it does not do, and the window constraint. It does not explain the meaning of all parameters, but the output schema likely covers return values. The description is complete enough for an agent to decide when to call it and what to expect, though a bit more detail on required inputs (date/place) would make it fully complete.

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 0%, so the description must compensate. It explains the meaning of the time window (time_from and time_to) and the output semantics, but it does not explain the roles of date, place, geonameid, chart_id, lang, or ayanamsa. However, the description's focus on the window concept and the explicit 'between 13 and 16' example helps clarify the two required parameters. The other parameters are standard for astrological tools and their names are self-explanatory, but the description does not add detail beyond the schema.

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 clearly states the tool's purpose: given a birth time window, it determines what is determinable (stable Moon sign, nakshatra, pada, current period) and what is not, and lists possible lagnas with time boundaries. It explicitly distinguishes itself from rectification, which is a strong differentiator.

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?

The description explicitly says when to use this tool (when birth time is known as a window) and what not to do (do not pick one lagna for the user, do not treat it as rectification). It also specifies the window constraint (up to six hours within the same day), which is a clear usage boundary.

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