upservice_get_channel_file_url

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

Annotations already declare readOnlyHint, idempotentHint, and destructiveHint. The description adds valuable context: the URL is 'fresh' (newly generated) and 'time-limited' (expires), which contradicts no annotation. No contradiction found.

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 concise, front-loading the main purpose in the first sentence, followed by a structured Args/Returns section. It is slightly verbose with the 'Returns' line but overall efficient.

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?

The description covers the essential aspect (fresh, time-limited channel-scoped URL) and the return format. With a full input schema and output schema, it is sufficiently complete for a simple read operation. Minor: could clarify that the file must belong to the given channel.

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 input schema already provides good descriptions for both parameters ('file_id' and 'channel_unique_identifier'). The tool description merely restates their names and types without adding new meaning, so baseline 3 is appropriate given high schema coverage (100%).

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 clearly states it gets a fresh, time-limited download URL for a file scoped to an external channel. The verb 'get' and specific resource 'channel file download URL' make the purpose precise and distinct from sibling tools like upservice_get_file_url, which may handle general file URLs.

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 explicit guidance on when to use this tool versus alternatives, such as upservice_get_file_url for non-channel files or upservice_get_task_attachments for task attachments. The channel scope is implied but not compared to siblings.

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