set_download_behavior

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

With no annotations, the description carries full burden for behavioral disclosure. It mentions a prerequisite ('Requires a recent Firefox') and the effect of avoiding the dialog, but omits details like whether downloads in progress are affected or any needs for permissions.

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 sentences with no wasted words; the first sentence immediately states the purpose and modes, the second adds key context. Highly 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?

For a simple setter with no output schema, the description is fairly complete, covering purpose, behavior, parameters, and a prerequisite. Could implicitly mention 'for future downloads' but that is minor.

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 description adds meaning beyond the enum values by explaining 'allowed' saves silently, 'denied' cancels, and 'default' resets, making the parameters more intuitive.

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 the tool controls download handling with three explicit modes (allow, deny, reset), and distinguishes from sibling tools like list_downloads (view) and clear_downloads (delete) by its action-oriented verb 'control'.

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 provides clear context for when to use this tool (to manage download behavior) and includes a behavioral hint ('Avoids the native save-file dialog'). However, it does not explicitly mention when not to use it or suggest alternatives.

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