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

Annotations already indicate this is not read-only and not destructive. The description adds useful context about 'public snapshots' and the fact that a receipt is 'retained', implying a side-effectful store. It does not disclose details such as retention policy, idempotency, or error behavior, but it does add some value beyond the annotations.

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?

The description is two sentences with no filler. The main action and outcome are front-loaded, and the unrelated watch-status endpoint is cleanly separated so it does not confuse the tool's purpose.

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?

This tool has no output schema and 10 parameters, yet the description explains neither the snapshot structure nor the 'material changes' threshold nor the receipt format. An agent would likely struggle to construct a valid call without external documentation.

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 carries a heavy burden for explaining the 10 parameters, and it does not. It weakly suggests that 'prior' and 'current' are the two supplied snapshots, but gives no guidance on data_classification, protocol, task_class, continuity_handle, or the other required fields.

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 states a specific action ('Compare two supplied public snapshots') and a concrete outcome ('return material changes with a retained receipt'). It does not fully articulate how this differs from sibling tools such as gaip_verify_supplier_claims or verify_gaip_receipt, but the core purpose is unmistakable.

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 description gives clear context about what the tool is for and explicitly points to a separate watch-status endpoint, implying this tool is not for scheduled cohort watch. However, it does not provide explicit when-to-use guidance versus the sibling verification tools, leaving some routing to inference.

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