fast_browser_sessions

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

The description implies a non-destructive read operation, which is appropriate, but it fails to explicitly state safety or side effects. Since no annotations are provided, the description carries the full burden, but it lacks details on return format or data nature.

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 sentence of six words with no redundancy. Every word is essential for conveying the tool's action and target.

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?

Without an output schema, the description should clarify what a 'session' entails or the format of the list. The current text is adequate for a simple tool but leaves ambiguity about the nature of the returned data.

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?

There are zero parameters, so the description does not need to add parameter semantics. The baseline score of 4 applies as the schema coverage is 100% (void) and the description adds no conflict.

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 uses the verb 'List' and specifies the resource 'stored browser sessions', making the tool's purpose clear. It distinguishes itself from sibling tools like fast_browser_act or fast_browser_state by focusing solely on listing sessions.

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 guidance is provided on when to use this tool versus alternatives. The description does not mention prerequisites, context, or exclusions, leaving the agent to infer usage without explicit direction.

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