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

Annotations already declare readOnly, idempotent, non-destructive and openWorld, so the safety profile is covered. The description adds useful context beyond that: the decision is 'private' and access is gated by a receipt, implying per-resource authorization. It stops short of saying what happens with an invalid/expired receipt or what the response contains.

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 short, front-loaded sentence with no filler. It is efficient, though at 0% schema coverage the brevity borders on under-specification rather than genuine conciseness.

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 two-required-parameter tool with no output schema and no parameter documentation, the description leaves the agent guessing about case_id, receipt format, and return contents. Given the unexplained name/description mismatch and the reliance on an access credential, more disclosure was warranted.

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 meaning of both parameters. 'Using its receipt' loosely maps to receipt_key, but case_id is never explained at all, and no format, source, or validity expectations are given for either field.

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 concrete verb ('Read') and resource ('a private complaint decision'), with the access mechanism ('using its receipt') named. It does not, however, differentiate itself from siblings like read_draft_status or report_content, and the mismatch between the name 'report_status' and the phrase 'complaint decision' leaves the object being read slightly ambiguous.

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 guidance about when to call this versus any alternative (e.g. report_content or read_draft_status), nor any stated prerequisites beyond the implicit need for a receipt. The only usage signal is the phrase 'using its receipt', which hints at required input rather than context for invocation.

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