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get_time_until_next_prayer

Calculate the time remaining until the next Islamic prayer. Provides minutes and a readable countdown string based on location coordinates.

Instructions

Return minutes until the next prayer and a human-readable countdown string (e.g. '2 hours 15 minutes').

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
latitudeNo
longitudeNo
Behavior2/5

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

With no annotations, description bears full burden. It mentions output format but fails to disclose behavior for null parameters or error cases, nor does it explain if location defaults are used.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness3/5

Is the description appropriately sized, front-loaded, and free of redundancy?

Single sentence is concise but omits essential parameter explanation, making it underinformative despite brevity.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness2/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

Tool relies on optional location params, yet description does not explain default behavior or fallback; no output schema means return structure is unclear.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters1/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is 0%, and description adds no meaning to latitude/longitude parameters; agent cannot infer their role in determining location.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose4/5

Does the description clearly state what the tool does and how it differs from similar tools?

Description clearly states returning minutes until next prayer and countdown string, distinguishing it from siblings like get_next_prayer which returns prayer name, but does not explicitly differentiate from other time-related tools.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines2/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

No guidance on when to use this tool versus alternatives like get_next_prayer or get_prayer_times; no prerequisites or context provided.

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

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