to_hijri

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

The description discloses the output format (JSON object string) and components. However, it does not mention potential errors (e.g., invalid date input), edge cases, or any limitations. No annotations are provided, so the description carries the full burden.

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?

One concise sentence that includes the essential information: operation, input, and output format. No unnecessary words.

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 is simple with one parameter and no output schema. The description adequately explains the output format and content. Could mention that the output is a string representation of a JSON object, but that is clear. Minor improvement would be to clarify that the date must be in the format YYYY-MM-DD.

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%, and the description adds the example '2025-09-23' which is already implied by the ISO 8601 specification in the schema. No additional semantic value 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 action (convert), the inputs (Gregorian date), the outputs (Hijri components), and the output format (JSON object string). It is distinct from sibling tools like format_hijri which likely formats an existing Hijri date.

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 on when to use this tool versus alternatives. For example, if a user wants a formatted Hijri string, format_hijri might be better. The description does not mention any prerequisites or exclusions.

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