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

The annotations already declare readOnlyHint, idempotentHint, openWorldHint, and non-destructive behavior, so the safety profile is covered. The description adds the key behavioral trait that the download is 'short-lived', which is useful context not present in annotations, though other details like expiration window or permission requirements are absent.

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 a single front-loaded sentence with no wasted words. However, its conciseness comes at the cost of under-specification, as it merely duplicates the title rather than adding actionable detail.

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 no output schema and 4 required parameters, the description should clarify what the 'short-lived download' returns (e.g., a URL and expiry) and how to obtain the case/attachment IDs. It omits these essentials, leaving the agent under-informed for even a simple read operation.

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 50% (company and environment have descriptions; case and attachment do not). The description mentions 'attachment' and 'case' relationally but does not explain their formats or how to obtain valid UUIDs, leaving the gap unaddressed for half the parameters.

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 is a verbatim restatement of the tool title, so it adds no information beyond what the title already conveys. While the title itself is clear, the description fails to independently state a specific verb and resource in a way that distinguishes this tool from siblings.

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?

No when-to-use guidance, no exclusions, and no alternatives are mentioned. An agent must infer that this tool is for downloading attachments, but receives no help on selecting it over related tools like summer_cases_get.

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