Close All Sessions

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

No annotations are provided, so the description carries the full burden. It states the action (closing sessions) but does not disclose whether this is destructive, irreversible, or if it prompts for confirmation. It also doesn't mention behavior when no sessions are active. This is a minimal disclosure that adds little beyond the tool name.

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, crisp sentence that states the action and scope without any fluff. It is appropriately sized for a simple tool and front-loads the key behavior.

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 tool with no parameters, no output schema, and simple semantics, the description is almost complete. It does not mention return values or error handling, but these are not critical for a straightforward 'close all' action. The description gives the agent enough to invoke it correctly.

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 tool has zero parameters and schema coverage is 100% (trivially), so the baseline for parameter semantics is 4. The description adds nothing about parameters because none exist, which is appropriate.

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 'Close all active browser sessions' uses a specific verb (close), names the resource (browser sessions), and specifies scope with 'all', clearly distinguishing it from close_session (singular) and get_sessions (list). It is unambiguous and immediately tells the agent what the tool accomplishes.

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 implies usage: close all sessions at once, but it does not explicitly state when to prefer this over close_session or when not to use it (e.g., when only a specific session should be closed). No alternative tools are mentioned, leaving the usage decision to inference.

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