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

Annotations declare readOnlyHint=true, idempotentHint=true, destructiveHint=false, and openWorldHint=false. The description's 'using live gold and silver prices' implies fetching external dynamic market data, which contradicts openWorldHint=false and idempotentHint=true. Per the scoring rules, this is an annotation contradiction and scores 1.

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?

A single short sentence that front-loads the asset classes and the live-price mechanic. It contains no wasted words, though it is a dependent phrase rather than a complete sentence.

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 rich input schema fully covers the optional parameters, but with no output schema the description should clarify the return value (e.g., zakat amount or breakdown) and the calculation basis. It only implies that the output is 'Zakat owed' and leaves method details unstated.

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%, with all 13 parameters documented including defaults, enums, and constraints. The description adds no parameter-level meaning beyond what the schema already provides, so the baseline of 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 the calculation subject and the asset classes covered (cash, gold, silver, shares, business stock), and notes the live-price dependency, making it clearly distinct from sibling screening tools. However, it uses a noun phrase rather than an explicit verb, and does not outright say it returns the zakat amount.

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 is given on when to use this calculator versus alternatives, nor are there any prerequisites or exclusions. The intended use is only implied by the name and the asset list.

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