Keyboard Press

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

Annotations already declare destructiveHint=true and readOnlyHint=false, so the agent knows this is a mutating action. The description adds that input is not echoed in the result, which is useful behavioral context. However, it doesn't describe other side effects like potentially overwriting existing content or how special key sequences behave. With annotations covering the safety profile, 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?

The description is a single sentence that is front-loaded and free of fluff. Every word adds value: it states the action, target, and a key behavioral detail. Excellent conciseness.

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 simple two-parameter tool with annotations and output schema present, the description covers the essential purpose, target, and a return behavior. However, it lacks usage guidelines (when to use vs alternatives), which is a minor gap. Overall, it's fairly complete but not perfect.

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 both 'keys' and 'interval' already described. The description adds no additional parameter-level meaning beyond what the schema provides. Baseline 3 is appropriate since the schema handles parameter semantics.

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 'Send keyboard text/keys to the active page element', specifying the verb and resource. The phrase 'active page element' differentiates it from tools like element_type which target specific elements, but it doesn't explicitly name alternatives. It also mentions the return behavior, adding clarity.

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?

No guidance is provided on when to use this tool versus alternatives. It doesn't mention that it targets the currently focused element, nor does it contrast with element_type or other typing tools. The usage context is implied but not explicitly explained.

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