Click

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

Annotations already declare destructiveHint=true, idempotentHint=false and openWorldHint=true, so the risk profile is known. The description adds real context beyond that: the click is synthetic (untrusted), and it may submit forms or trigger consequential real actions, plus the fresh-observation prerequisite. It does not discuss failure/stale-ref behavior.

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?

Three short sentences, front-loaded with the action and its nature, then consequences, then prerequisites. No filler, though the undefined term 'the claim' introduces mild ambiguity for such a terse note.

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 five-parameter mutation tool with no output schema, the description covers the mechanism, the side-effect risk and the inputs required. Missing only edge-case handling such as stale observation or failed click outcomes, which slightly limits completeness.

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%, including the ref pattern, context_id format and request_id retry semantics, so the schema carries the burden. The description only vaguely gestures at 'the claim' and 'a fresh observation' without mapping them to context_id/observation_id or clarifying what 'claim' refers to.

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?

States a specific verb (click) and target (a control), and immediately qualifies the mechanism as a synthetic DOM click rather than a trusted user click. That distinction separates it from sibling interaction tools like browser_fill, browser_type and browser_key, which target inputs and keys rather than arbitrary controls.

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?

It gives a precondition ('Needs the claim and a fresh observation'), which tells the agent it must hold a valid claim and a snapshot-derived ref before calling. It never states when to prefer this over browser_fill or browser_key, nor what to do when the observation is stale, so usage is only implied.

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