title

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

With no annotations, the description carries the full burden, but it only states the action. It implies a read-only, non-destructive operation but does not explicitly confirm it, nor does it mention edge cases like no loaded page or frame context. For a trivial getter, this is adequate but not rich.

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?

A single, front-loaded sentence with zero filler. Every word earns its place, and the content is immediately actionable.

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 and the absence of an output schema, the description is sufficiently complete. An agent knows it retrieves the current page's title without needing additional detail. The optional session/lease parameters are covered in the schema, so no gaps remain for correct invocation.

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 schema covers both parameters (lease and session) with detailed descriptions, achieving 100% coverage. The tool description adds no parameter information, but the schema already does the heavy lifting, so a baseline of 3 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 'Get current page title' is a precise verb+resource statement. It clearly tells the agent exactly what the tool does and distinguishes it from siblings like 'url' (URL) and 'text' (page text). No ambiguity.

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 purpose is self-evident in the context of browser automation, making the intended use obvious without explicit guidance. While it doesn't name alternatives or exclusions, the sibling set and the phrase 'current page' provide clear context for when to invoke it.

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