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

The annotations already declare readOnlyHint=true, openWorldHint=true, and destructiveHint=false. The description adds substantial behavioral context beyond that: the link is temporary and valid for 20 minutes, it works without an API key, and it should only be shared with someone authorized to see the file.

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 short, front-loads the key fact (temporary download link valid 20 minutes), then covers the parameter source, security caveat, and endpoint. Every sentence adds useful information without repetition.

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 one-parameter read operation with no output schema, the definition covers what the tool returns conceptually, how long the link lasts, where the file id comes from, and the sharing security constraint. Nothing needed to call it correctly is missing.

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%, so the file_id description already explains that it is a GUID. The description adds useful provenance by specifying that the id comes from method_list_files, which helps the agent obtain a valid value before calling.

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 verb and resource: get a temporary download link for an attached file. It also names the sibling tool where the required file id comes from, so the agent can distinguish this from method_list_files and other list/get 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?

It clearly establishes the prerequisite by saying the file id comes from method_list_files, and it gives a sharing constraint: share the link only with someone allowed to see the file. It does not explicitly state when not to use this tool or name a true alternative, so it falls short of the full 5 criteria.

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