get_prayer_times

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

With no annotations, the description carries the full burden. It discloses the returned data (5 prayer times + Sunrise), date format (ISO 8601), and defaults (today, configured coordinates). It does not describe error handling or timezone behavior, but the core functionality is transparent.

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?

Two sentences, front-loaded with the key action and output. Every sentence provides essential information without redundancy.

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?

No output schema exists, yet the description only mentions 'all 5 daily prayer times plus Sunrise' without specifying field names or format. Given the tool's complexity and lack of output schema, more detail on the return structure would improve completeness.

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 is 0%, so the description must compensate. It explains the 'date' parameter format and default, and mentions location defaults to configured coordinates, but does not explicitly name the 'latitude' and 'longitude' parameters or their meaning. Partial value added.

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 returns all 5 daily prayer times plus Sunrise, specifying the verb 'return' and the resource. It distinguishes from siblings like 'get_next_prayer' or 'get_monthly_prayer_calendar' by focusing on a specific date and location.

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 states when to use the tool: to get prayer times for a given date and location. It mentions defaults for date and location, providing context. However, it does not mention when not to use it or list alternatives among the many sibling tools.

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