click

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

No annotations are provided, so the description carries the full burden of behavioral disclosure. While 'click' implies a user interaction that may trigger page changes, the description doesn't specify what happens after clicking (e.g., navigation, form submission, JavaScript events), whether it waits for page loads, or error handling for invalid selectors. This is inadequate for a mutation tool with zero annotation coverage.

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, direct sentence with no wasted words. It front-loads the core action ('click') and target ('element on the page'), making it immediately understandable without unnecessary elaboration.

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 that performs a user interaction on a web page with no annotations and no output schema, the description is insufficient. It lacks details on behavioral outcomes, error conditions, dependencies (e.g., needing a loaded page), or how it relates to sibling tools, leaving significant gaps for an agent to use it effectively.

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 description coverage is 100%, with the parameter 'selector' clearly documented as a CSS selector. The description adds no additional parameter information beyond what the schema provides, which is acceptable given the high schema coverage, resulting in the baseline score of 3.

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 action ('click') and target ('an element on the page'), which is specific and unambiguous. However, it doesn't explicitly differentiate from sibling tools like 'hover' or 'select', which also interact with page elements but perform different actions.

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 no guidance on when to use this tool versus alternatives like 'hover', 'select', or 'fill'. It doesn't mention prerequisites (e.g., requiring a page to be loaded) or exclusions, leaving the agent to infer usage context from the tool name alone.

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