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

Annotations already declare readOnlyHint=true, idempotentHint=true and destructiveHint=false, so the safety profile is covered. The description adds genuinely new behavioral context beyond the annotations: results are public, and the tool will never fabricate customer cases, which is a meaningful trust guarantee for an agent deciding whether to cite the output.

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 short, front-loaded sentences with the core purpose first and no padding. The trailing 'Read-only.' sentence is largely redundant with the readOnlyHint annotation, which is a minor waste of the limited space.

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?

With an output schema present, the description need not explain return values, and with zero parameters there is no argument surface to document. It covers the availability caveat and the anti-fabrication guarantee, leaving only minor gaps such as result ordering or recency window definition.

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?

The tool takes zero parameters, so per the rubric the baseline is 4. The description correctly implies a no-argument, no-filter retrieval, and there are no parameter semantics left for it to compensate for.

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 gives a specific verb ('Return') and resource ('public recent sourcing cases') with a scoping qualifier ('when verified case data is available'). It is clearly distinguishable from siblings like get_contact or get_service_area, though it does not explicitly name what makes it different from the capability-listing 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?

The phrase 'when verified case data is available' implies a usage condition, but it is a caveat about data availability rather than guidance on when an agent should choose this tool over siblings. No alternatives or exclusions are named, so usage remains inferred.

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