get_letter_properties

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

Annotations already declare readOnlyHint, idempotentHint, non-destructive, and closed-world, so the safety profile is covered. The description adds the meaningful constraint of a 1-29 letter batch and the source provenance (Book A pp.40-45), but says nothing about what happens with letters outside the range or unsupported characters.

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 compact phrase with the scope constraint and source citation front-loaded; nothing is wasted. It is a fragment rather than a sentence, which is efficient but reads slightly telegraphic.

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?

An output schema exists, so return values need no explanation, and the tool is a simple one-parameter read. Still, for a mutation-free lookup with 0% schema coverage on its only parameter, the input format for `letters` should have been stated.

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 0%, so the description must carry the load for the single `letters` parameter. It clarifies that the input is Arabic letters and caps the count at 29, but a string array with maxLength 512 leaves unresolved whether entries are single Arabic characters, transliterations, or letter names.

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 names a specific resource and specifies exactly what is returned: place of articulation and characteristics for Arabic letters, scoped to Book A pp.40-45. The verb is only implicit (the tool name supplies 'get'), but the content is distinct from siblings like get_tajwid_rule or get_qaloun_passage.

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?

There is no when-to-use guidance and no mention of alternatives such as get_tajwid_rule or analyze_qaloun_tajwid, so an agent must infer selection from the content noun phrase alone. The 1-29 letter bound hints at batch usage but is not framed as guidance.

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