fx_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. It describes what to click and how to locate it, but says nothing about what happens if no locator is supplied, whether both ref and selector can be used together, or whether the click may trigger navigation or asynchronous changes.

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 entire description is one efficient sentence with no filler. The key scoping detail, that refs come from fx_snapshot, is front-loaded and 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?

For a tool with two optional-looking parameters and no output schema, the description omits the critical constraint that at least one locator must be supplied. It also provides no information about failure behavior or what the tool returns, making it sufficient only for the happy path.

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 0%, so the description must add meaning to the parameters. It does clarify that ref is an identifier from fx_snapshot and selector is a CSS selector, but it does not specify whether at least one is required, whether they are mutually exclusive, or which takes precedence if both are provided.

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 states a precise action ('click') on an element and explicitly names two locator strategies: a ref from fx_snapshot or a CSS selector. This clearly distinguishes it from sibling tools like fx_type, fx_select, and fx_toggle.

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 a workflow: obtain a ref from fx_snapshot or provide a CSS selector. However, it gives no explicit guidance about when to prefer fx_click over sibling interaction tools, and it does not state any exclusions or alternatives.

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