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

Annotations already declare readOnly, idempotent, non-destructive, closed-world behavior, so the safety profile is covered. The description adds real context beyond them: results are computed by VedicDost's software and all times are local to the requested place. It doesn't discuss response size or failure modes for invalid places, which keeps it from a 5.

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?

Front-loaded with purpose and output inventory, then a short usage sentence; no filler. The long enumeration of returned fields is dense but each item carries information, though it reads as a single run-on clause rather than structured lists.

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?

With no output schema, the description correctly carries the return-value burden by enumerating the computed elements and noting locale/timezone behavior. What remains thin is guidance on the coordinate parameters and on how the language enum affects returned text, though the schema handles language reasonably well.

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 sits at 50%: date, place and language are documented in the schema, but latitude, longitude and timezone have no descriptions anywhere. The description says only that times are local to the place, which hints at timezone/location handling without explaining how the raw coordinates interact with the place default, so the coverage gap is not fully compensated.

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 pair (Hindu panchang calculation for a date and place) and enumerates the exact outputs: vaar, tithi with paksha, nakshatra, yoga, karana with end times, sunrise/sunset, Rahu kaal, Yamaganda, Gulika, Abhijit muhurat and choghadiya. This is distinguishable from siblings like find_muhurat or get_kundli without opening any schema.

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?

Supplies concrete trigger phrasings ("aaj ka panchang", "Rahu kaal today", "which tithi is today", "shubh choghadiya") that map user intent to this tool clearly. It stops short of naming when to prefer a sibling such as find_muhurat for muhurat search, so routing between overlapping tools is still partly left to inference.

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