flix_pause_transfer

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

With no annotations provided, the description carries the full burden of behavioral disclosure. It simply states 'pause' without explaining whether the pause is reversible, what happens to the transfer state, or any side effects. This is insufficient for a tool that modifies the state of a transfer.

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, concise sentence with no redundant words. It is efficient and front-loaded, but it is so minimal that it may be under-specified rather than properly concise. Still, it earns a high score for being succinct and direct.

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?

Given the tool's simplicity (one parameter, no output schema), the description is minimally adequate but leaves gaps. It does not explain the effect of pausing, whether it can be resumed, or any error conditions. Sibling tools like resume and cancel provide context, but the description alone does not fully specify the operation's context.

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 documents the single parameter 'transferId' with the description 'Transfer ID to pause', providing 100% coverage. The tool description adds no additional semantic detail about the parameter beyond the schema, so the baseline score of 3 applies.

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 'Pause an ongoing file transfer' clearly identifies the action (pause) and the resource (ongoing file transfer). It distinguishes itself from sibling tools like resume and cancel by specifying the operation type, making the purpose unambiguous.

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 does not explicitly state when to use this tool versus alternatives like cancel or resume. It implies applicability to ongoing transfers but lacks guidance on prerequisites or scenarios where pause is preferred. No exclusions or alternatives are mentioned.

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