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

No annotations are present, so the description must carry the behavioral burden. It does disclose that the response contains the latest version content and conditionally includes a public_url when published. Still, it does not address access/sharing prerequisites, error behavior, or explicitly confirm the absence of side effects beyond the word 'Fetch'.

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?

Two concise sentences with no filler. The core purpose is front-loaded, followed by a single specific note about the conditional public_url field.

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 simple single-parameter tool with an output schema, the description covers the essentials: what to fetch, what version to expect, and a notable conditional return field. Minor omissions like authentication expectations and failure semantics are not critical for a straightforward 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 coverage is 100% and the only parameter, file_id, is described as 'File UUID'. The description adds no extra meaning about the parameter, such as ownership, sharing scope, or how to find the ID, so the schema already carries the full semantic weight.

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?

Description states a specific operation ('Fetch') on a specific resource ('a shared file') and the key return characteristic ('latest version content'). This clearly differentiates it from sibling tools like file_create, file_update, file_publish, and file_list, which use different verbs or operate on collections.

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 purpose sentence implies usage for retrieving a single file, and it is naturally the get-by-id counterpart to file_list. However, there is no explicit guidance about when to prefer this tool over storage_get or when it should not be used, leaving the agent to infer context.

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