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

Annotations declare openWorldHint=true and readOnlyHint=false, and the description corroborates this by naming the external destination and the consent precondition, plus that the message must be the reader's own words rather than a paraphrase. It does not disclose what happens after sending (confirmation, failure modes, whether the email address is stored), which is the remaining gap for an irreversible outbound action.

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?

Three dense sentences with no filler: destination and subject matter first, triggering condition second, content requirements third. The prohibitive clause lands last, which is the right emphasis for a write action.

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?

For a 6-parameter outbound send with no output schema, the description covers who triggers it, what to send, and in what form. Missing only post-send behavior and any note on the surah/ayah pairing and optional email, which keeps it just short of fully complete.

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?

At 67% schema coverage, the description adds real meaning: it maps the report subject matter onto the 'kind' enum ('a problem with... a suggestion'), constrains 'message' to the reader's verbatim words, and explains that 'ayah'/'reciter' identify what the report is about. It leaves 'surah' undocumented in both description and schema, and never mentions 'email', so it does not fully compensate for the coverage gap.

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 a specific verb and resource ('Send the reader's report to readqurantoday.com') and enumerates exactly what counts as a report: text problem, translation, tafsir, recitation, or suggestion. This is clearly distinguished from every sibling tool, all of which are read-only retrieval tools.

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?

Gives an explicit positive trigger ('Only when the reader asks to report or suggest something') and an explicit prohibition ('Never on your own initiative'), which is exactly the guidance needed for an outward-facing action. No inference required.

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